554 A Monograph of Culicidae. 



Habitat. — Sande and Goyaz, Brazil (Dr. Lutz). 



Observations. — Redescribed from two 9 ' s given me by 

 Dr. Lutz. 



It is a very marked species of general black hue, but in 

 certain lights the abdomen is blue and violet and shows four 

 white spots and a white apical band ; the two fore and mid 

 femoral spots are also very pronounced characters. 



Genus CACOMYIA. Coquillett. 



Class. Mosq. N. and M. America, Tech. Se. 11, U.S. Dept. Agri. Div. Ent., 



p. 16 (1906). 



Coquillett separates Haemagogus albomaculatiis and H. equinus 

 from the genus Haemagogus, and places them in a new genus 

 which he calls Cacomyia. 



The difference seems very slight, but still sufficiently marked 

 to render the two genera easily separable. 



The characters are as follows : — " Base of the first sub- 

 marginal cell noticeably nearer the apex of the wing than is 

 the base of the second posterior cell ; palpi of the $ about one 

 half as long as the proboscis ; abdomen of the $ with a large 

 cluster of outstanding blunt spines on the under side of the 

 penultimate segment." 



Unfortunately Lutz's genus Gualteria resembles this in all 

 respects save in that the first sub-marginal has its base nearer 

 the base of the wing than that of the second fork-cell. 



The two species are easily separated as below : — 



Abdomen with white scales in the middle 



of the last two segments only albomaculata. Theobald. 



Abdomen with white scales in the middle 



of some of the other segments equina. Theobald. 



Cacomyia equina. Theobald (Coquillett) (1903). 



Barmagogus equinus. Theobald (1903). 



The Entomologist, XXXVI., p. 282 (1908) ; Mosq. Jamai., p. 37 (1905), 

 Theobald; Mosq. N. and M. America, p. 25 (1906), Coquillett. 



Head metallic violet, white between the eyes in front ; palpi 

 and proboscis black ; antennae pale brown. Thorax metallic 

 green ; pleurae snowy white. Abdomen bright metallic violet . 

 with three prominent and one faint silvery-white basal bands 



