Diptera 291 



hh. With shorter proboscis; the petiole of the anterior forked 



cell arises near the base of the wing 



Psychoda, Pericoma, etc. , 



gg. The r-m crossvein placed at or beyond the center of the wing; 



wings not folded roof -like over the abdomen. 



h. Proboscis short, not adapted for piercing; wings bare (Dixi- 



D^); or wings scaled (Culicid^, Subf. Corethrin^). 



hh. Proboscis elongate, adapted for piercing; wings scaled, 



fringed on the hind margin; antennas of the male bushy 



plumose. Mosquitoes 



CULICID.*; (exclusive of Corethrin^) 



i. Metanotum without setae. 



j. Proboscis strongly decurved; body with broad, ap- 

 pressed, metalescent scales; cell R2 less than half as 

 long as its petiole; claws of female simple, some of the 

 claws of the male toothed. Several large southern 

 species believed to feed only on nectar of flowers 



Megarhinus R. D. 



jj. Proboscis straight or nearly so, or otherwise different, 

 k. Scutellum evenly rounded, not lobed; claws simple in 

 both sexes Anopheles Meig. 



I. Abdomen with clusters of broad outstanding scales 



along the sides; outstanding scales on the veins of 

 the wing rather narrow, lanceolate; upper side of 

 the thorax and scutellum bearing many appressed 

 lanceolate scales. Florida and southward (Cellia) . 

 m. Hind feet from the middle of the second segment 

 largely or wholly snow white. 

 n. With a black band at the base of the last seg- 

 ment of each hind foot 



A. albimanus* and tarsimaculata* 



nn. Without such a band. . . .A. argyritarsis* 



mm. Hind feet black, mottled with whitish and with 



bands of the same color at the sutures of the 



segments. W. I A. maculipes 



II. Abdomen without such a cluster of scales; outstand- 



ing scales of the wing veins rather narrow, lanceo- 

 late; tarsi whoUy black, 

 m. Deep black, thorax obscurely lined with violace- 

 ous, especially posteriorly; head, abdomen and 

 legs black; no markings on the pleura; ab- 

 domen without trace of lighter bandings; 

 wing scales outstanding, uniform, not forming 

 spots, though little thicker at the usual points 

 indicating the spottings. Florida. .A. atropus 



♦Species marked with an * are known to transmit malaria. Species found only in tropical 

 North America and not known to carry malaria have been omitted from this table, but all fotmd 

 in the United States are included. 



