AMERICAN DIPTEKA. 365 



apices of the hind femora black. All the tibia ciliated above with setulae, those 

 on the four posterior tibia; being very distinct. Wings subhyaline, very faintly 

 yellowish, costal bristles rather short, veins dark, seventh vein distinct. 



Represented by specimens from St. Vincent and Grenada, W. I. 

 Some of these I have compared with the original types in the Mu- 

 seum of Comparative Zoology at Cambridge. They agree well in 

 all details. There are also two specimens— one from Natrona, Pa., 

 and one from Philadelphia, Pa (Johnson) — which are less typical, 

 but belong to this species. 



\|>hio4-li:i-t;i a urea Aldrich. (Plate vii, fig. 35.) 

 Aldrich, Trans. Ent. Soc. Lond., 1896, 437. 



Yellow, lower frontal bristles proclinate, second vein forked, the abdomen, or 

 at least the dorsal part, reddish orange in color. Front, antennae and palpi yel- 

 low, arista yellow at base. Dorsum with one pair of dorsocentral macrochaetae 

 and four marginal scutellar bristles ; thorax wholly yellow; halteres yellow, in 

 some cases brownish about the apex. Legs wholly yellow, the tarsi scarcely 

 darker; middle and hind tihiae each with a row of nearly a dozen small bristles, 

 running down the posterior edge ; hind femora moderately thickened, with a few 

 very small bristles below near the tip. Abdomen bright reddish-orange in color, 

 toward the apex and below irregularly blackened. In one specimen, a male, the 

 reddish color is confined to the base, and there is a well-defined black spot on each 

 side of the middle of the dorsum. Wings quite deeply tinged with yellow, the 

 heavy veins reaching far out beyond the middle of the wing; costal bristles very 

 short ; fourth vein but little curved, ending at or but little before the apex of the 

 wing ; tip of first vein about equally distant from the humeral cross-vein and from 

 the tip of the third ; seventh vein distinct to the border. 



Length 1.3 1.7 mm. 



I have seen the original types from St. Vincent, W. I., and also 

 several specimens from the Island of Grenada, W. I. 



This species is remarkable for the extreme length of the costal 

 vein and the bright orange-red color of the abdomen. It conies 

 very close to scalaris Lw., but the costa is longer and its cilia are 

 stouter and more thickly placed. The lower pair of proclinate setae 

 are also much weaker than in scalaris. 



Aphiochsela magnipalpis Aldrich. (Plate vii, fig. 36.) 

 Aldrich, Trans. Lond. Ent. Soc, 1896, 438. 



Male. Head, thorax, antennae and abdomen black ; palpi, pleurae and halteres 

 brownish black. The palpi in the male are enlarged, divaricate, and destitute of 

 the usual strong setae. Thorax with one pair of dorsocentral macrochaetae and 

 two marginal scutellar bristles. Wings hyaline, the light veins very slender, tip 

 of first vein just midway between the humeral and the fork of the third, on the 

 costa. Fifth vein with a much greater curvature than usual, almost parallel 

 with the vein before it, ending but little behind the apex of the wing. Legs 

 rather stout, hind tibia; not ciliate with bristles, or setulose. 



Length 1-1.25 mm. 



TRANS. AM. ENT. SOC. XXIX. NOVEMBER, 1903. 



