84 DIPTEEA. 



the submarginal and first posterior cells, and a larger spot (separated by a broader 

 brown interval from a trapezoidal spot on the posterior margin, which is bisected by 

 the posterior branch of the fourth vein) in the middle of the discal cell. Besides the 

 spots forming the cross-bands, a small spot is visible near the proximal end of the 

 marginal cell, and two, still smaller ones, within the distal ends of the anal and 

 axillary cells. First posterior cell coarctate at the end, but open; the second vein, 

 issuing from the discal cell, runs very obliquely, and ends in the margin very near 

 the first vein (the figure does not render it quite correctly). 



Two females, one in Prof. Bellardi's collection, the other in the British Museum. 

 The figure of the wing was drawn from the former, and represents the distal limit 

 of the black, with an indentation that does not exist in the specimen in the British 

 Museum ; in the Turin specimen the white abdominal spots are abraded ; in both the 

 antennae are damaged. 



5. Exoprosopa limbipennis, <j $ . 



Exoprosopa limbipennis, Macq. Dipt. Ex. Suppl. i. p. 110, t. 20. f. 3 1 . 



First posterior cell closed ; wings with a brownish, tinge, darker along the costa ; abdomen with a broad cross- 

 band of whitish-yellow scaly hairs on the second segment, and a narrower cross-band of similar hairs on 

 the fourth segment, the sixth and seventh segments with silvery scales. 



Length 15-17 millim. 



Hab. Mexico, Yucatan \ Ventanas 2000 feet (Forrer), Solco 1 (coll. Bellardi). 



Face conically protruding; the proboscis projecting a little beyond the oral edge; 

 antennae dark brown or black, the scapus often reddish, the style at least two thirds the 

 length of the third joint ; the dark brown face and front densely clothed with appressed 

 fulvous scaly hairs, and the space between them with short, erect black hairs, which 

 extend over the vertex ; occipital orbits with a yellowish or silvery fringe of scaly hairs. 

 Thorax brown, with the usual yellowish-fulvous hairs in front and on the sides, and 

 black macrochsetse on the callosities ; the dorsum with shorter, appressed, rather scarce, 

 scaly fulvous hairs, more dense in front of the scutellum ; the latter reddish-brown, with 

 black scales at the base and a fringe of fulvous, short, scaly hairs along the posterior 

 margin. Abdomen black, with black, appressed scaly hairs, and tufts of longer black 

 hairs on the sides of the segments, beginning with the posterior margin of the second ; 

 the usual yellowish cross-band occupies the proximal half of the second segment, and 

 bears a tuft of pale yellowish hairs at each end ; a similar, much narrower, cross-band 

 on the third segment (in most specimens it is abraded, and only a spot of whitish scaly 

 hairs at each end remains visible); a more whitish cross-band on the fourth segment; 

 the sixth and seventh segments in the male are entirely covered with silvery scaly 

 hairs ; in the female these hairs are white rather than silvery, and form a cross-band 

 on the sixth segment, the posterior margin of which is black. Halteres with a brown 

 knob. Legs black. Wings subhyaline, with a slight brownish tinge ; the costal margin 



