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Blackburnia riparia, new species is described from the summit of Mt. Waialeale, Kauai, Hawaii, incorporated into a phylogenetic analysis of Blackburnia Sharp, and thereby placed as the adelphotaxon to two other allopatric Kauai species, B. lata Liebherr and B. atra Liebherr. The new species occurs in riparian habitats, including vertical rock-faced seeps and algal mats, and is documented to feed on aquatic larvae of Micropsectra Kieffer (Diptera: Chironomidae). Blackburnia elegans (Sharp) adults also occur in streams on Waialeale summit where they were found walking under water on the undersides of large, flat rocks. Based on documented prey and observed behavior, both species appear to forage under the waterline. The abdominal and elytral anatomy of adult B. riparia and B. elegans is suitable for retention of a subelytral air bubble, suggesting these species respire underwater. Adults and associated larvae of Blackburnia mandibularis Liebherr inhabit moss-mats along falls' margins at Waipoo Falls, Kokee State Park, Kauai, indicating that this species' active life stages also reside in the riparian zone. Attributes of the larval head capsule and mandibles for B. riparia and B. mandibularis are associated with homologous characters expressed in adult anatomy, ontogenetically linking larval and adult head and mouthpart specializations. The various evolutionary origins of riparian habits are examined across Blackburnia. Via one route, occupation of the montane riparian zone has evolved from terrestrial moss-mat habitation, with concomitant evolutionary reduction of adult compound eyes. A second evolutionary route to the riparian zone is based on occupation of open, disturbed or ephemeral habitats, in some cases assisted by adult winged dispersal.
Blackburnia kavanaughi, new species, previously misidentified as Blackburnia asquithi Liebherr, is described from the western portion of the Alakai Plateau, Kauai, Hawaii. The species is placed phylogenetically based on cladistic analysis including all known Hawaiian Blackburnia, supporting membership in the subgenus Metromenus Sharp. The new species is hypothesized to be most closely related to B. debilis (Perkins) of Molokai and B. kuiki Liebherr of East Maui, sharing enhanced pubescence of the antennal pedicel, reduction in number of the dorsal elytral setae, and elongate ventrolateral setae of tarsomere 5. Individuals of all three species reside in deep arboreal moss mats associated with ohia lehua trees (Metrosideros polymorpha: Myrtaceae). Blackburnia debilis, previously known only from the single male holotype collected in 1902, was recollected in 2005 from Uapa summit, Molokai, in arboreal moss on the mesic leeward edge of ohia lehua forest. Discovery of B. kavanaughi on Kauai implies an additional colonization event from Kauai to newer islands during the diversification of Blackburnia, while corroborating the previous general biogeographic pattern of progressive colonization of the Hawaiian Islands by this clade. Phylogenetic placement of B. debilisB. kuiki as adelphotaxon to B. kavanaughi results in a hypothesized sister-group relationship between sympatric sister species—the epigean B. calathiformis (Sharp) and the troglobitic B. howarthi (Samuelson and Liebherr)—corroborating F. G. Howarth's general hypothesis for the evolution of Hawaiian troglobites.
Certain Holoptilini (Reduviidae: Holoptilinae) have long been believed to attract and paralyze ants through secretions released from a sternal structure on the abdomen termed a “trichome.” In this study, the trichome for adults of Ptilocnemus lemur is examined in detail, the first time in any Holoptilini. The trichome comprises a median elevation on abdominal sternite 2, a transverse groove, a median projection on sternite 3, and four groups of setae and hair-like projections. The hair-like projections (hairs of group 3 and 4) are shown to be associated with a layer of glandular units, which may be the source of ant-attracting or paralyzing secretions. Apart from these glandular units, a second type of glands is present on the sternum. These so far undocumented glandular units are arranged in distinct areas on the pregenitalic sternites, and are conspicuous by their large pores. Nymphs of P. lemur do not possess a trichome, but the glandular areas on the pregenitalic segments are already present.
The morphology of a macropterous form of Anommatocoris China is described for the first time, based on Anommatocoris bolivianus, new species. Scanning micrographs and line art are provided for most aspects of external morphology; comparative illustrations are provided for members of the tingid subfamilies Cantacaderinae and Tinginae. Characters establishing the relationships of the Vianaidinae with other groups of the Miroidea sensu Schuh and Stys, 1991 are analyzed phylogenetically and discussed.
Eight new species of Hygia from Malaysia (Borneo) are described, and included in the tribe Colpurini. The new species are as follows: H. alta from Sarawak, H. borneensis from Sarawak, H. mjobergi from Sarawak and Sabah, H. murudina from Sarawak and Sabah, H. reyesi from Sarawak and Sabah, H. tomokunii from Sarawak and Sabah, H. vantoli from Sabah, and H. webbi from Sarawak. Dorsal view illustrations and drawings of the male genital capsule, and female genital segments are provided.
Papuamorbus rostellus, new genus and new species, is described from Papua New Guinea, and included in the tribe Amorbini. A dorsal view illustration and drawing of male genital capsule are provided. A key to the known genera of Amorbini is given.
In 2001 Brood VII of the periodical cicada in central New York emerged over a reduced geographic range, as predicted by Pechuman (1985). We found no evidence in Livingston or Cayuga Counties of periodical cicadas emerging in the populations studied by Pechuman during the 1984 emergence, and the majority of the brood is now limited to populations in Onondaga Nation Territory. The decline of Brood VII during the 20th century has occurred in spite of an increase in the total area of potentially suitable habitat across New York and specifically in the counties in which the cicadas were historically present. The observed reduction in range is discussed in terms of a historical spatial bottleneck followed by fragmentation of historically-occupied habitat combined with the poor abilities of these cicadas to disperse to new habitat.
We surveyed apple orchards in the Finger Lakes region of New York State. Pollinator guilds included many honey bees and native bee species known to be effective pollinators of apples. Of the 31 native bee species collected, 14 species belong to eight subgenera of Andrena. Cavity-nesting mason bees were represented by a single female blue orchard bee, Osmia lignaria Say. The most numerous bees were mining bees in the genus Andrena. This paper serves as a preliminary look at the native bee pollinators in apple orchards in New York State.
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