HOW TO KNOW THE IMMATURE INSECTS 



59a. Antenna 3-segmented with apical segment and a disk-shaped ap- 

 pendix; stipes and mentum separate; cardo present; galea 2-seg- 

 mented. Fig. 242 Family PHENGODIDAE 



ZRACoM 



It is reported that the species of ?h.en- 

 godes prey upon myriapods. Some larvae 

 have light-producing organs, and are very 

 attractive, sometimes displaying two or 

 more colors of lights. The adult females 

 of some species resemble the larvae. 



Fig. 242. a, Phengodes sp.; 

 b. Ventral aspect of head. 



59b. Antenna 1 or 2-segmented, distally covered with a large dome- 

 shaped appendix; stipes and mentiiin fused; cardo vestigial or 

 absent; galea 1-segmented. Fig. 243 Family LYCIDAE 



They are similar to the lampyrids 

 to which they are related. The adults 

 fly by day, and are not luminous. 

 Less than 100 species are known for 



Fig. 243. Calopteron retieula- j^^^^j^ America. 



turn F. 



60a. Frontal sutures present 61 



60b. Frontal sutures absent 65 



61a. Lacinia distally armed with 1 or more spurs. 



Fig. 244 FamUy DERMESTIDAE 



The family consists of about 

 550 described species. The lar- 

 vae are covered with long or 

 short hairs and feed upon dead 

 animal and plant materials in- 

 cluding skins, horn, hair, wool, 

 tallow, cxired meats, cheese, mu- 

 seum specimens and cereal 

 products. Some very serious 

 household pests belong to this 

 family. 



Fig. 244. a, Carpet beetle; b, Maxilla. 



