28 ENTOMOLOGICAL SOCIETY 



Hermes and Protohermes the anal vein has two forks. As 

 this point is readily observed I shall consider it the first in 

 distinguishing genera. 



The forking of the branches of the median vein is very 

 useful, as pointed out by Mr. Davis ; a but in some specimens 

 the fork is very close to the margin and only in one branch. 

 There is another point in venation which is very suggestive ; 

 that is the number of cross-veins between the radius and radial 

 sector. All the American forms have but three (in one wing 

 of one Neuromus hieroglyphica I find four), while in the 

 Oriental forms there are five, six, or more, perhaps occasionally 

 but four, except in the true Chauliodes (C. japonicus, C. 

 diversus) which have but three cross-veins. One can not 

 apply this point as of prime importance since it would widely 

 separate otherwise closely related forms, as for example the 

 Oriental and American Corydalis and Nenromus. 



The genera I recognize may be tabulated as follows : 



TABLE OF GENERA OF CORYDALIN^. 



1. Anal vein of fore-wings with but one fork 4 



Anal vein with two forks ; anal cells subequal in length ; the lower 



with two branches, the upper with none 2 



2. A cross-vein between the first branch from the anal vein and the 



last branch from the anal cell; costal cells broader than long; an- 

 tennae much nearer eyes than ocelli; branches of median vein 

 forked; more than three cross-veins from radial sector to radius. .3 

 No such cross-vein present ; antennae about as near ocelli as to eyes ; 

 cells of costal area about as long as broad; branches of median 

 vein not forked, three cross-veins from radial sector to radius. 



Neohermcs. 



3. Ocelli small, the median twice its diameter or more from the 



others Hermes. 



Ocelli large, the median about its diameter or less from the others. 



Protohermes. 



4. A distinct tooth on margin of head behind each eye; antennae nearer 



to eyes than to ocelli, last tarsal joint about as long as basal; at 

 least one branch of median vein forked; pronotum longer than 



broad ; upper anal cell with one branch 5 



No such tooth on margin of head behind each eye; antennae as near 

 mid-ocellus as to eyes; branches of median vein simple; pronotum 

 usually as broad as long; radial sector connected to radius by 

 only three cross-veins, upper anal cell with 2 veins or one forked 

 vein 6 



" Bui. 68, N. Y. State Museum, p. 452, 1903. 



