F. R. COLE 21 



subcylindrical, the apex with setae. Scutellum transverse; abdo- 

 men ovate, thorax barely wider; wings short, the venation as in 

 Pialea; middle longitudinal veins extending straight to posterior 

 margin of wing, however. Near the genus Pialea, differs in the 

 insertion of the antennae and also in the median longitudinal 

 veins." 



Pialeoidea magna 



Pialeoidea magna Walker. 

 Crijlus magnus Walker, List. 



"Dark luteous, disc of thorax and transverse spot on abdomen black. 

 Length 7 Hnes. Expanse 13 hnes. 



"Dark luteous, luteous pilose. Head black, luteous pilose, antennae pice- 

 ous, third joint (except base) black. Disc of thorax and transverse bands to 

 base of abdominal segments bronzy-black. Tarsi pale, the ungus black. Teg- 

 ulae pale fuscous. Wings lutescent, veins brownish." 



Habitat.- — Georgia. Type in British ■Museum. 



Pialeoidea metallica 



Pialeoidea mttallica Williston, Biologia, Dipt., i, p. 165. 



"Thorax metallic green; abdomen brown, shining, the segments with paler 

 hind margins; legs reddish yellow; wings brownish. Length .5-6 mm. 



"Hab. Guatemala, Antigua (StoU). 



"The third joint of the antennae is broken and for that reason I cannot 

 refer the species to the genus Pialeoidea Westwood, with certainty. The 

 head is remarkably small, the ej^es separated by a narrow front, and the wings 

 very near like those figured by Westwood; the scutellum is rather broad; but 

 there are three instead of two ocelli; and the occiput is very much developed 

 (as in Westw., 1. c, fig. 3a), and if seen from the side it occupies one half of the 

 breadth of the head (differing therefore from 1. c, fig. 3b). The venation dif- 

 fers in the following principal points: the second basal cell is connected with 

 the margin of the wing by a vein running between the fifth posterior cell and 

 the anal cell (in the figure quoted this vein is omitted, and these cells coales- 

 cent; is not this omission accidental.*); the fourth posterior cell is not in 

 contact with the second basal cell; and the second submargina cell is of a 

 different shape, e. g., longer and broader at the base. 



"The vertical triangle is large, somewhat protuberant; the ocelli equidis- 

 tant. The eyes pubescent; beneath the vertical triangle approximate but 

 without coming in contact; below the antennae almost touching. The anten- 

 nae are inserted in the middle of the head, within a space formed by an emar- 

 gination of the eyes; their basal joints in close contact. Proboscis short. 



"Head black; basal joints of the antomiae brown; the vertical triangle 

 greenish metallescent. Thorax metallic green, beset with scattered, erect, 

 moderately long, yellowish hairs; scutellum more bluish metallic. Abdomen 

 brown, hind margins of the segments with a whitish Ijordor, both on the dorsal 



TRANS. AM. ENT. SOC, XLV. 



