288 



AN INTRODUCTION TO ENTOMOLOGY 



Chatiliodes. — See the table on page 287 for the dibtinguishing 

 characteristics of this genus. There are two species in our faiina; 

 these are distinguished as follows: 



Chatiliodes rastricornis. — In this species the antennas are serrate; 

 the embossed markings on the head and prothorax are black on a 

 paler ground; and the prothorax is longer than wide. 



Fig. 322. — Larva of 

 Corydalus. 



Fig. 321. — Corydahis cornutus, male. 



Chaidiodes pectinicornis. — In this species the antennae are serrate; 

 the embossed markings on the head and prothorax are yellow on a 

 black groimd; and the prothorax is not longer than wide. 



Neohermes. — This genus is represented by Neohermes calif ornicus. 

 In addition to the characters given in the table of genera above, this 

 species is distinguished by the great length of its antennas, which are 

 about two-thirds as long as the fore wings. 



Nigronia. — In this genus the wings are black or brown with white 

 markings. Two species only are kno\\Ti; these can be distinguished 

 by the form of the white markings on the wings. 



Nigronia fascidtus. — In this species there is a continuous, broad, 

 somewhat arcuate, white band extending across the middle of each 

 wing and almost attaining the hind margin. 



Nigronia serricornis. — In this species there is an irregular band of 

 white spots, generally broadest in front, extending across the middle 



