Mentum (Fig. a) with 4th laterals reduced to about level of 5th lateral (type II); c1 tooth narrow and tall, c2 teeth separated (type IB or III).
Ventromentum (Fig. b) about 202-210 µm wide, 3.15-3.61 times wider than deep; 1.07-1.23 times the mentum width; with about 31-34 striae; VMR about 0.25 (0,24-0.26). Pecten epipharyngis (Fig. c) with about 14-16 mostly even sized, sharp teeth, but distal teeth smaller.
Premandible with inner tooth slightly longer and about 3.3-4 times the width of the outer tooth, both teeth narrowing markedly to a sharp tip.
Antenna with basal segment relatively long and narrow, 0.4 of ventral head length, about 3.3-4.3 times as long as wide; RO about 30-40% up from base; AR about 2.24-2.53; A2/A1 about 0.19-0.22; A4/A3 about 1.5-2.4; segment lengths (micron) about 105 : 22.5 : 8 : 10 : 6.
Distance between the antennal bases probably about the same as that between the S4 setae, which are separated by about 77-86% of the frontoclypeus width.
Mandible (Fig. d) about 240-250 µm long, with 3rd inner tooth pale and almost completely fused (type IA); 18-19 furrows on the outer surface near the base; 10-11 taeniae in the Pecten mandibularis; Mdt-Mat about 30 µm and MTR 0.33-0.36.
Cytology: 4 polytene chromosomes with thummi-cytocomplex arm combination, AB, CD, EF, G.
Arm G often largely unpaired and with a virtually terminal nucleolus and a BR separated by a further 7-10 bands. Polymorphism at least in arm B near the centromere and arm E. Bulb (seg7) subterminal in arm B with some dark bands immediately proximal.
Found: Kansas - Mill Creek (38.95°N, 94.80°W), nr. Craig, Kansas.
Louisiana - Bar ditch, Many, Sabine Parish.