94 C. R. Osten Saclcen: Diptera 



The whole body is velvet-black; head yellow, including rostrum 

 and palpi, but the middle of the vertex black; a more or less large 

 brown spot in the middle of the rostrum; some of the joints of the 

 palpi infuscated; the scapus of the antenna is somewhat brownish or 

 yellowish; the flagellum black; a broad yellow stripe occupies a large 

 portion of the pleura; it begins in front of the root of the wing and 

 ends above the middle coxa; above the upper end of this stripe there 

 is a yellow spot on the mesonotum, which may be considered as the 

 prolongation of the stripe; a more or less broad yellow band on the 

 second abdominal segment; it is especially developed on the ventral 

 side; legs black, with a white ring near the root of the tibiae. "Wings 

 brown; a hyaline spot at the distal end of the first basal cell; it 

 encroaches a little on the discal and sometimes also on the marginal 

 cell. — Three males. 



NB. One of the specimens has the yellow portions of the thorax 

 remarkably pale, almost whitish. 



Ctenophora idalia n. sp. $. — Wings brown, ivith a 

 white spot in the middle; scutellutn yellow. — Length 14 — 15 mm. 



Very like C suspirans, only the scutellum, the base of the femora 

 and the sides of the metanotum are yellow; the hyaline spot on the 

 middle of the wings is larger, and encroaches considerably on the 

 second basal cell, as well as on the marginal; there is a small triangular 

 hyaline spot at the extreme proximal end of the two basal cells. — 

 Rostrum anteriorly, face and scapus of antennae brownish -yellow; front 

 above the antennae black; a yellow crossband reaches from eye to eye 

 across the vertex; back of it, the occiput is again black; the root of 

 the wings, as well as the basal portion of the halteres, are yellow. — 

 One male (damaged). 



Ctenophora dolens n. sip. $Q. Wings unicolorous, hrown. — 

 Length $ 12 — 14 mm., Q (without ovipositor) 15 — 16 mm. 



Whole body velvet-black, except the intermediate segments of the 

 abdomen, which are reddish-yellow; wings uniformly brown; legs black, 

 two basal thirds of the femora yellow; white rings near the base of 

 the tibiae. Head dark brown, including the rostrum; antennae black or 

 brown; in the male, each joint of the flagellum is whitish at the tip; 

 palpi variable, pale yellowish or brownish ; halteres brown. The base of 

 the abdomen is black; the three following segments are reddish-yellow; 

 the end, including the genitals, is again black ; but the black at the base 

 is variable in extent; in two of the specimens it emits a black dorsal 

 and another ventral stripe, which encroach upon the yellow. — Two 

 males, one female. 



