148 JOUKNAL OF ENTOMOLOGY AND ZOOLOGY 
caudal end, etc. These dilierences are pointed out in the following 
key : 
Larv.^ 
1. Size smaller (fully grown, length, 14-15 mm.) ; mandible with 
the largest of the two teeth at mid-length, slender, rather 
sharply pointed; labrum with the lateral lobes produced 
cephalad and proximad, almost touching one another on the 
middle line; stigmal field with the dark markings pale, brown, 
those of the ventral lobes not enclosing an oval pale area at 
their proximal ends. Hexatoma megacera O. S. 
Size larger (fully grown, length, 18-26 mm.) ; mandible with 
the largest of the two teeth at mid-length stout, blunt; labrum 
with the lateral lobes produced cephalad and scarcely proxi- 
mad, widely separated from one another; stigmal field with 
the dark markings black or very dark brown, those of the 
ventral lobes contiguous at their inner ends and there enclos- 
ing an oval pale area. Eriocera fultonensis Alex. 
Pup^ 
1. Size small (length under 10 mm.) ; scapal spine larger; no pro- 
jection on the mesonotal praescutum. 
Hexatoma megacera O. S. 
Size larger (length over 12 mm.) ; scapal spine small; a small 
projection on the mesonotal praescutum. 
Eriocera longicornis Walk. 
ERIOCERA Macquart 
The information that was available concerning the species of this 
genus was included in a paper by Alexander and Lloyd cited before 
(Journal of Entomology and Zoology, VI, March, 1914), but since 
that article was written a few more items concerning the biology of 
members of this genus have been ascertained. 
Eriocera brachycera Osten Sacken. 
Eriocera brachycera Osten Sacken; Bull. U. S. Geol. Surv., Ill, 
205, 1877. 
This species is one of the rarer forms in the Eastern United 
States. A pair that was collected by the author on August 4, 1914, 
