HOW TO KNOW THE IMMATURE INSECTS 



21a. Mala (lacinia and galea) and stipes fused. 



Fig. 190 22 



Fig. 190. Maxilla 

 21b. Mala segment-like, movable. Fig. 191. ..Family STAPHYLINIDAE 



This is one of the largest family of insects and 

 including more than 20,000 species. The adults 

 are called rove beetles. The larvae are typically 

 campodeiform and often closely resemble the Cara- 

 bidae. The larvae of certain species are definitely 

 known to be carnivorous and predacious. Certain 

 larvae ore pupal parasites of cyclorrhaphous Dip- 

 tera and undergo hypennetamorphosis. 



MAJLA 



Fig. 191. Maxilla. 



22a. Mandible with apex simple/ recurved and bent away from the 

 sagittal plane of the larva. 

 Fig. 192 Family PLATYPSYLLIDAE 



>i^f<:c//fvf^ 



The family consists of a single species, 

 the beaver beetle, Platypsyllus castoris 

 Rits., which is an ectoparasite of the beav- 

 er in Europe and America. The biology of 

 the immature stages is not known. 



Fig. 192. a, Mandible; b, 

 Plot/psylius castoris Rits. 



22b. Mandible with apex differently shaped, never recurved, 



23a. Galea present, often developed as a small, 

 hairy lobe on top of lacinia. Fig. 193. . . .24 



23b. Galea and lacinia fused 25 



23 



81 



