AQUATIC INSECTS IN NEW YORK STATE 459 
with a broad white band, pointed with fuscous, not attaining 
the posterior margin; one or more apical marginal spots, some 
cross veins bordered with white; posterior pair with a broad 
arcuate white band not attaining the posterior margin, and a 
large rounded basal white spot, also a small apical spot and 
sometimes the cross veins bordered with white. Length to tip 
of wings 35 to 40 mm; alar expanse 60 to 70 mm. The males 
are the more highly colored on the head and thorax, and the 
dark part of their wings is more uniformly black. 
The inferior appendage of the male is elongated, narrower 
at tip, and of a pale brown color. The males are the smaller. 
When the wings of this species are spread, the white are 
across their center is nearly continuous from one to the other. 
New York, Pennsylvania, Glen Echo D. C., Maryland, Sugar 
Grove O., Illinois, Lake of the Woods, Missouri, Arkansas, 
Mexico. 
2 (. serricornis Say 
1824 Chauliodes serricornis Say, Long’s Exp. -2:307 
1889 Chauliodes serricornis Burmeister, Handb. Ent. . 2:949 
1842 Neuromus maculatus Rambur, Hist. Nat. Neur. p.442, pl.10, 
fig.2 
1853 Hermes maculatus Walker, Cat. Brit. Mus. Neur. p.202 
1859 Chauliodes serricornis Say, Am. Ent. LeConte ed. 1:206 
1861 Chauliodes maculatus Hagen, Synopsis Neur. N. Am. p.191 
1863 Chauliodes serricornis Hagen, Ent. Soc, Phila. Proc. 2:180 
1863 Chauliodes serricornis Walsh, Ent. Soc. Phila. Proc. 2:262 
1869 Chauliodes serricornis McLachlan, Ann. and Mag. Nat. 
Hist. (4) 4:40 
1892 Chauliodes serricornis Banks, Am. Ent. Soc. Trans. 19:357 
1892 Chauliodes serricornis Say, Banks, Am. Ent. Soc. Trans. 
19:357 
1901 Chauliodes serricornis Needham, N. Y. State Mus. Bul. 47, 
 p.549, pl.27 
Body black; back of head with flat, ferruginous streaks and 
spots which are sometimes black; prothorax fuscous, impressed 
each side; legs and feet nigro-fuscous; antennae serrate in both 
sexes; inferior appendage of male is of a shining black at tip; 
wings black, a transverse interrupted white line in middle of 
front wings, widest at anterior margin, not attaining the pos- 
