JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
147 
of the third ahdoniina! segment; in some speeimens the tarsal seg- 
ments are much nearer to the posterior margin of the third abdomi- 
nal segment, but there is always a marked difference in the tips of 
the tarsi of the various legs. 
Male. Cephalic crest viewed from the side, triangular, ending in 
an acute point which is directed strongly forward (Plate II, Fig. 
1). Viewed from beneath (Plate II, Fig. 2), the lobes are con- 
spicuously triangular, pointed, lying parallel or slightly divergent 
and separated by a deep median split. Spine on the scape of the 
antenncT very large, conspicuous; tubercle on the labrum strongly 
developed. Pronotal breathing-horns short, straight. Mesonotum 
strongly crenulated along the middle line; scutellar lobe not devel- 
oped. Posterior leg sheaths extending beyond the level of the mid- 
dle legs, which, in turn, are longer than those of the fore legs. 
Wing pads dark, the venation not showing clearly, but if made out 
the very short cell R- and the reduced M are characteristic of Hcxa- 
tonici alone. Abdomen with about 34 spicules on sternite 4; about 
30 in a straight uninterrupted row on tergites 3 and 4; about 20 on 
tergite 5. Hypopygium with the sternal lobes strongly rounded, 
enlarged and bent strongly dorsad. 
Length: From crest to tip of the abdomen, 9.2-9.6 mm. 
Dextro-sinistral width at wing-pad: 1.2 mm. 
Dorso-ventral depth at wing-pad: 1.4 mm. 
Female. As in the male, the ovipositor viewed from the side 
with an obtuse notch. From beneath, the sternite is obtusely 
pointed with a deep median split. From above, the tergite is almost 
flat across the caudal margin, the lateral angles rounded, a deep 
median split. The antennal sheaths are much shorter than in the 
male (Plate II, Fig. 3). 
Both sexes of the pups described from numerous specimens from 
Cascadilla Creek, Ithaca, N. Y., May 2, 1913; May 6, 1914. 
The larva of Hexatoma in many respects is close to Enoccra 
fultonensis Alexander in the shape of the markings on the stigmal 
disk, the teeth on the mandible and the lateral lobes of the labrum. 
The pupa, on the contrary, suggests Eriocera lougicornis Walker 
very closely in the shape of the cephalic crest, appearance of the 
