240 3I0SQUIT0ES 



VIII.— CtEXUS Toxorhynchites. 



These are anions: the largest of our mosquitoes, and closely re- 

 semble those of the following genus. Our single species has all 

 of the feet marked with white : 



rut Has Coq, 



IX.— Genus Megarhinus. 



Our three species are among the largest in this family, and are 

 not known to occur north of the District of Columbia. They 

 may be separated as follows : 



Hind feet alone marked with white 1 



None of the feet marked with white luTmorrhoidaUs Fabr. 



1. Front and middle feet wholly black portoricensi's Roeder. 



Front and middle feet yellow, first joint of the front ones 

 black * grandiosa Will. 



X.— Genus Anopheles. 



(a) RECOGNIZED SPECIES. 



1. With a yellowish white spot near three-fourths the length of 



the front margin of the wing 3 



Without such a spot 2 



2. Scales of last vein wholly black, palpi wholly black 



maculipennis Meig. 



Scales of last vein white, marked with three black spots, palpi 



marked with white at bases of last four joints, crucians Wied. 



3. Hind feet wholly brown, scales of last vein white, those at 



each end black pnnctipeniii.s Say. 



Hind feet largely snow-white on the apical half. 



argyritarsis Desv. 



* This species, of which I have never seen a specimen, probably be- 

 longs to the preceding genus. — D. W. C. 



