The immature stages of Bittacus planus Cheng, 1949, including egg, four larval instars, and pupa, are described and illustrated for the first time. The egg is spherical, with two types of micropyles. The larva is eruciform and peripneustic, bearing eight pairs of prolegs on the abdomen. A pair of compound eyes and a median ocellus are present on the head. Each segment of the abdomen has rows of protuberances bearing setiferous clavate setae. The pupa is exarate and decticous. The species is univoltine, overwintering as diapausing eggs on the ground. Larval duration, including a prepupa of 10 days, lasts about 30 days. Pupation occurs in a soil cell, ranging from 10 to 15 days. The roles of larval compound eyes and the ocellus in the phylogeny of Holometabola are briefly discussed.
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. 111 • No. 1