AQUATIC INSECTS IN NEW YORK STATE 453 
aa Tracheal gills on ventral side of the first seven abdominal 
segments; last pair of spiracles not raised on respiratory 
tubes nor on conical folds 
b Antennae VBL VIED SEO OTRES:, sic, wave ataiete cco erate la eiévele-e ase Neuromus 
Beeeentennae With Six SC@MENMIS..... 2... cece ne cascneccces Corydalis 
' Egg massesi 
MEE COM CECE (<5. o'ora c's o/h ulate aves eaices pada wa waters « Chauliodes 
aé Mass normally covered with a whitish coat of albuminous 
UPA MRE ETT Ae CLM acre BSc sad a cc Ric: fi age avaver a dis Spee ’e.eoe ee Corydalis 
Eggs 
a Micropylar projection distinctly at one side of apex; neck less 
than half the width of micropylar surface [fig.20]...Chauliodes 
aa Micropylar projection near the apex; neck nearly as broad as 
Prana C SUT ACR. -[ HO Scie ahs So oe an we wel e ne vie wie dees Corydalis 
CHAULIODES Latreille 
Adult. Smaller than Corydalis; body 20 to 40 mm long, the 
male often being smaller than the female. Prothorax quadran- 
eens 
ee a Saas 
Fig. 24 Fore wing of Chauliodes x3 
gular, narrower than the head, and shorter than the mesothorax 
and metathorax combined; no toothed angle on sides of the head; 
three large approximate ocelli facing at about 120° from each 
other; antennae moniliform serrate, pectinate, or flabellate; 
mandibles not prominent, concealed by the labrum when closed; 
wings numerously veined, the accessory veins of the radial sector 
extend backward from R, in both pairs of wings; radial sector 
with four to six branches, and medius always with only two 
branches [fig. 24]; cross veins between all the branches of radius 
varying in different species, from seven to about 20; hind wings 
broad at base and folded in the anal area when at rest; alar ex- 
panse 50 to 90 mm; tarsi cylindric, five jointed; caudal append- 
ages conical, stout, inferior pair often simple in both sexes, supe- 
rior pair simple in female and slightly prehensile in male, 
1EXggs of Neuromus have never been described. 
