HOW TO KNOW THE IMMATURE INSECTS 



66a. Ventral mouth parts retracted. (See Fig. 251c) 67 



66b. Ventral mouth parts protracted. (See Fig. 250). 



Fig. 252 FamUy CERAMBYCIDAE 



The family is about sixth in size in the 

 order and contains about 20,000 described 

 species. Because of the large thorax the lar- 

 vae are called roundheaded borers. The eggs 

 are laid on or in the host plants and the fe- 

 male beetle sometimes girdles a limb so that 

 the larvae may feed on the dying wood. The 

 larvae feed as borers on both living and dead plants, and are very 

 destructive. Some of these larvae are known to live for many years. 



Fig. 252. Roundheaded 

 apple tree borer, Saper- 

 da Candida Fab. 



67a. (a) The back of the mandible either with 2 long flagellate setae 

 distally, and the body of the mandible partially fleshy or fully 

 sclerotized; or (b) the back of the mandible without long setae 

 distally, and the body of the mandible always fleshy, only with 

 the base, or the tip and the base sclerotized. 

 Fig. 253 most LATHRIDIIDAE 



The members of this fam- 

 ily number more than 700 

 species and are found in 

 moss, decaying wood and 

 fungi. A few have occured 

 in herbaria, dried carcasses 

 and in ants' nests. 



Pig. 253. a, Cortodcre eottuloto Reit.; 

 b. Mandible. 



67b. The back of the mandible without long flagellate setae distally, 

 and the body of the mandible completely sclerotized 68 ' 





68a. Maxillary mala with distinguishable lacinia and 

 galea. Fig. 254 69 



Fig. 254. 

 Maxilla. 



68b. Maxillary mala entire, sometimes bilobed anteriorly. 

 Fig. 255 71 



101 



