The life history and morphology of the third instar and pupa are described for Onthophagus landolti Harold, 1880 (Coleoptera: Scarabaeidae). Instar developmental time was determined by analyzing cephalic width data using generalized linear models. Morphological descriptions were done of the third instar and pupa, comparing taxonomically relevant characters to other species of Onthophagus Latreille, 1802 species. Developmental time took 30 days from egg to teneral imago. The egg period lasted 2–3 days, the larval period 20–22 days, and the pupa 6–8 days. Cephalic width ranged 0.750–0.850 mm for the first instar, 0.925–1.075 mm for the second instar, and 1.125–1.300 mm for the third instar. Duration of the first instar was 2–3 days, the second instar lasted 3 days, and the third instar 10–13 days. Onthophagus landolti larvae exhibit morphological characters common to other American Onthophagus. The principal interspecific variation in chaetotaxy was observed on the labium-hypopharynx.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 69 • No. 2