1 66 KANSAS UNIVERSiTY QUARTERLV. 



short, exceedingly convex, with pile as on the thorax: bristles on the 

 last segment. Ovipositor short, flat, triangular. Tips of tibiae and 

 the tarsi yellow. Wings very broad, with extremely wide obtuse tips; 

 picture black with hyaline spots and indentations; the black lllls out the 

 immediate tip only narrowly as a long cresentic hyaline baud parallels 

 the costa of the tip and relieves the otherwise solid black picture of 

 the distal third of the wing. In addition to the hyaline indentations 

 along the borders of the wing, there are two clear drops, one on each 

 side of the small cross vein; a narrow spot at the end of the anal cell; 

 and a small spot in the discal cell on the anterior side of the fifth 

 vein. The third vein is bristly; the cross veins are almost in the 

 same line. The posterior cross vein is doubly curved; its posterior 

 end is much nearer the tip of the wing than its anterior en<l, and the 

 discal cell is consequently consiiierably prolonged below. The lower 

 corner of the anal cell is widely drawn out. 



Length, 4 mm. 



One female specimen from San Domingo ( I'ra/ar). 



XENOCH/ETA n. gen. 



Front very broad. .Antennae shorter than face. l-'acc perpendic- 

 ular, short; the oral edge not prominent. Cavity of tlie mouth 

 moderately large; proboscis short, tiaps apparently not at all genicu- 

 late; palpi broad. Eyes nearly round, yef the cheeks narrow. Scu- 

 tellum not swollen, with six bristles. Wings with a blackish picture 

 of large irregular spots or blotches. Third vein almost naked, and 

 fifth vein entirely devoid of bristles; cross veins not very near 

 together, perpsnilicular; anal cell but slightly drawn out at lower 

 corner. 



Xenochaeta dichromata n sp. (Tl. \ll, f. 2.) 



Male. Hlack and yellow, shining. — Head reddish-yellow, l-'ront 

 darker, very wide, half the head or a little more in width; bristles 

 black, weak. Antennae a little shorter than face; third joint sharp 

 anteriorly; arista with short pubescence, thickened at base. Face 

 short, perpendicular; oral margin scarcely projecting. Oral cavity 

 moderately large; proboscis small ; palpi very broad, not extending 

 beyond edge of mouth. Eyes nearly round; cheeks narrow, with some 

 yellowish pile. Occiput blackish on upper half. Thorax black, with 

 black pile i)lentifully mixed with yellow; bristles black. Scutellum 

 mostlv black above and yellow below; a spot on either side and one 

 at the apex vellow; with six bristles, four strong, black, lateral ones 

 and two approximate, weak, yellow ones erected upon the apical 

 yellow spot. Abdomen short, wide at end of second segment and 



