504 bulletin: museum of comparative zoology. 



Aphiochaeta caribbaea, sp. nov. 



Type. — M. C. Z. 7,007. Grenada, H. H. Smith. 



9 . Length 2.2 mm. Dull yellow, with the front and an- 

 tennae black, and the abdomen much infuscated, especially at the 

 base and apex, but with the apical margins of all the segments pale; 

 legs pale yellowish, the posterior femora darkened at tips; wings 

 with a yellowish cast, veins light brown, the light veins strongly 

 colored; halteres pale brown. Front quadrate, with strong bristles; 

 four proclinate bristles, the lower pair nearly as large as the upper 

 and half as far apart; upper pair occupying nearly one third of the 

 width of the front, far above the lower pair and a little above the 

 inner bristles of the lower reclinate row; outer bristle of the lower 

 reclinate row next to the eye and well above the inner bristle which 

 is far from the eye; upper reclinate roAV of four equidistant bristles 

 with the median pair slightly lower than the lateral bristles; ocellar 

 tubercle prominent; median frontal groove rather indistinct; cheeks 

 each with a pair of bristles and several small ones rimning up the 

 iuner orbit toward the antennae. Antennae rather small; arista 

 strongly pubescent, scarcely twice as long as the height of the front; 

 palpi large, compressed, with several large bristles below on apical 

 third and some much smaller ones before these. Mesonotum some- 

 what shining, the dorsocentral machrochaetae present, with not 

 much larger than a row of smaller bristles that extends between them. 

 Scutellum subtriangular, with four large, equal bristles. Propleura 

 with several rather slender bristles next the front coxa and some 

 smaller ones above, several scattered over the disc and several next 

 the spiracle; mesopleura with a patch of fine hair-like bristles above 

 and one much larger one at the posterior edge of the group of small 

 ones. Although much larger than the others, this bristle is not so 

 large as in some other species like A. juli. Abdomen with distinct 

 bristles at the sides of the second segment. I^egs rather stoiit; fore 

 tarsi slender; hind tibiae with very small cilia on the basal half, 

 those on the apical half moderately well developed although delicate 

 and placed far .apart. Wings long and narrow, the costa extending 

 well beyond the middle, costal cilia quite short, especially at the 

 base; first section of costa, barely shoi-ter than the second and third 

 combined; second three times as long as the third; fork of third 

 vein moderately acute; fourth vein gently curved at both base and 

 apex; fifth almost straight; sixth slightly bisinuate; seventh long, 

 nearly straight. 



