OF WASHINGTON. 139 



Rivellia frugalis, n. sp. 



Black, the front and middle of upper part of the occiput reddish-brown, 

 first two joints of antennae and the tarsi yellow, apices of the tarsi brown, 

 thorax tinged with greenish, the abdomen with bluish. Antennae nearly 

 as long as the face, the third joint nearly four times as long as the 

 second, the lower anterior corner rather acute, arista bare. Thorax and 

 scutellum thinly grayish pruinose, scutellum bearing four bristles. Ab 

 domen not pruinose. somewhat rugose. Wings hyaline, marked with 

 four brown, rather narrow cross-bands; the first begins at apex of aux 

 iliary vein and extends to the fourth vein; the second extends from apex 

 of first vein to the fifth vein, passing over the small cross vein; the third 

 starts on the costa slightly beyond the middle of the distance between 

 apices of the first and second veins and passes over the hind cross veins, 

 stopping at the fifth vein; the last band begins at the costal end of the 

 third and borders the wing to apex of the fourth vein; small cross vein 

 near middle of the discal cell. Length 3 mm. 



Colombo, Ceylon. A female specimen. 

 Rivellia sinuosa, n. sp. 



Head reddish brown, the face and occiput except middle of upper part 

 of the latter, black; sides of front narrowly white pruinose; antennae yel 

 lowish, as long as the face, the third joint three times as long as the 

 second, arista short-pubescent, proboscis and palpi dark brown. Body 

 bluish-green, thorax and scutellum very thinly grayish pruinose, scutel 

 lum bearing four bristles ; abdomen not pruinose, somewhat rugose. Legs 

 black, tarsi yellow, their apices brown. Wings hyaline, a broad brown 

 stripe extends along the costa from base to apex of the auxiliary vein, 

 then narrows and in the submarginal and first basal cells ends in a wide 

 brown cross band that extends from apex of first vein, over the small cross 

 vein to hind margin of the wing just before apex of fifth vein where it 

 unites with a second wide brown cross-band that extends obliquely to the 

 costa at apex of marginal cell and continues along the costa to apex of the 

 fourth vein ; a short, broad brown cross-band extends from lower edge of 

 the costal stripe near the base of the wing, filling the bases of the discal 

 and third posterior cells. Length 3 mm. 



Bangalore, India. A male specimen. 



Family TRYPETID^. 

 Dacus diversus, n. sp. 



Head and its appendages yellow, base of proboscis brownish, face of 

 the male unmarked, that of the female with a transverse black fascia a short 

 distance above the oral border, front with a central brown spot and a row 

 of three brown dots along each eye, vertex with a narrow black fascia pro 

 duced forward in the middle so as to include the lowest ocellus, occiput 



