Bugs, Cicadas, Aphids, and Scale-insects 193 



To distinguish any of the various species of mealy-winged flies would 

 be a difficult matter for the beginning 

 entomologist. Two special students of 



FIG. 262. FIG. 263. 



FIG. 262. A mealy-wing, Aleyroies pruinosa, adult. (After Bemis; much enlarged.) 

 FIG. 263. Pupa of Aleyrodes tentaculatus. (After Bemis; much enlarged.) 



FIG. 264. FIG. 266. 



FIG. 264. Pupa of Aleyrodes iridtscens. (After Bemis; much enlarged.) 

 FIG. 265. Pupa-case of Aleyrodes merlini. (After Bemis; much enlarged.) 

 FIG. 266. Vasiform orifice and lingula of pupa of Aleyrodes merlini. (After Bemis; much 

 enlarged.) 



the American species have published lists and descriptions of all the kinds 

 so far known in this country, namely, Quaintance (Bull. 8, Tech. Ser., Div. 

 of Ent., U. S. Dept. Agr., 1900), who has studied the eastern species, and 



