ABT. 1 NEW DIPTEBA FROM SOUTH AMEEICA ALDEIGH 5 



the knobs of the halteres being brown. It may be doubted whether 

 O. setia is specifically distinct from O. aenescens. 



OPHYRA VIRESCENS Macquart 



Ophijia virescens Macquart, Dipt. Exot., vol. 2, part 3, 1843, p. 321 (sep. 

 p. 164). 



Briefly described from a female taken at Guaratuba, Brazil. The 

 type is probably no longer in existence, and the identity of the 

 species is very uncertain. The characters mentioned are: shining 

 green ; face wdth whitish pollen ; antennae and legs black ; calypters 

 pale yellow ; length 6 millimeters. Macquart also says, " thorax a 

 bandes noirs," which as I understand his terms may mean either 

 black longitudinal stripes or transverse bands on the thorax. If this 

 character is well developed, in either sense, it ought to make the 

 species recognizable. So far it remains unrecognized. 



OPHYRA CUTILIA Walker 



Anthoniifia cutilia Walker, List. Dipt. Ins., vol. 4, 1849, p. 954. 

 Ophyra cutilia Stein, Zeitsclir. Hym. Dipt., vol. 1, 1901, p. 194. 



Described from Montevideo, only the female being known. Stein 

 has added a few characters from his examination of the type. The 

 most prominent feature is the blackish calypters. I have a male 

 which I identify as this species, as the calypters are the same, and 

 the deep blue color of the female occurs in this male overlaid with 

 such pruinescence as usually distinguishes the sex in this genus. 



Color dark blue; the head, pleurae, legs, antennae, and palpi are 

 black; calypters brown, the hind one with blackish rim and long 

 brown fringe. Wings uniformly infuscated. 



Male. — Front very narrow, not much wider than front ocellus, 

 still the linear shining parafrontals are separated by a slender 

 median stripe. Lunule silvery, lower parafrontal shining black, 

 quite narrow; the parafacial with brown pollen beginning at about 

 the tip of the second antennal joint. Cheek about one-seventh of 

 the eyeheight. Frontal bristles beginning below the middle of the 

 space between ocelli and lunule; antennse dark brown, the arista 

 distinctly pubescent on basal third, slightly thickened at base, hind 

 edge of eye scarcely at all emarginate in side view. Hairs of back 

 of head all black. 



Thorax almost black, subopaque; acrostichals 1,1 (anterior small) ; 

 dorsocentrals 2, 4 ; intraalar 2, supraalar 1 (no prealar) ; presutural 

 1 ; sternopleura with a small bristle anteriorly and one large one 

 behind, acrostichal hairs in about four rows. Hind calypter long 

 and with unusually heavy fringe. Halteres yellow with blackish 

 knob. 



