Cranium heavily sclerotized, brown to dark brown. Frontoclypeal suture distinct. Labrum at apex with 3 truncate lobes. Epipharynx with row of setae on each chaetoparia, a blunt tooth in the haptomeral region, and united tormae. Abdominal segments 1-6 with 3 annuli, each with 1 or more transverse rows of short setae.
Spiracles cribriform, with closing apparatus.
Venter of last abdominal segment with raster consisting of 2 curved rows of many short setae that converge caudally. Doctoral Thesis, Department of Biology, Carleton University, Ottawa, Ontario, Canada. Indian Forest Rec. Papers Celebrating the 80th Birthday of Roy A. Crowson . Muzeum i Instytut Zoologii PAN, Warszawa, Poland.