106 DIPTERA OF NORTH AMERICA. [PART IV. 



tip ; stigma well marked, brown ; costal and first longitudinal 

 veins yellowish ; the other veins brown (compare the generic 

 character for more details about the venation). 



Hah. Washington, D. C, in May; New York; White Moun- 

 tains, N. H. ; Wisconsin (TJlke) ; Illinois (Walsh) ; South Carolina 

 (Mus. Berol ). 



This species varies in its coloring from ochraceous to brown- 

 ish ; Mr. Macquart drew his description from a dark specimen, 

 whereas I had a light-colored specimen before me, when I de- 

 scribed this species under a different naniQ in 1859. I have since 

 then recognized mj error. Mr. Walker's R. prominens, some 

 slight discrepancies in the description notwithstanding, is cer- 

 tainly the same species. 



Geu. VII. ELEPHANTOMl'IA. 



One snbmarginal cell ; four posterior cells ; a discal cell ; no marginal 

 cross-vein ; the tip of the auxiliary vein is at some distance beyond the 

 origin of the second longitudinal vein ; the subcostal cross-vein is close 

 at this tip (Tab. I, fig. 5). Ilostrum almost as long as the body, very slender, 

 JiUform ; the elongated, but minute palpi are inserted at its tip. AntennsB 

 apparently 15jointed ; all the joints of the flagellum are provided with 

 verticils. Tibiae without spurs at the tip. Erapodia indistinct. Ungues 

 smooth. The forceps of the male consists of the usual basal pieces with 

 two horny, claw-shaped appendages each (Tab. Ill, fig. 8, one-half of the 

 forceps of E. westwoodi). 



The eyes are large, glabrous, leaving a very narrow, linear 

 front between them above, and a somew^hat broader space below. 

 The rostrum is quite as long as the body in the male, and com- 

 paratively shorter in the female, on account of the greater length 

 of its abdomen ; it is straight in the living specimens, but becomes 

 arcuated in 1;he dead ones ; it is finely pubescent and perfectly 

 linear in its shape, from its root to the tip. The palpi are in- 

 serted close by. this tip; they are attenuated at their basis. Not 

 having had an opportunity to examine these palpi under a com- 

 pound microscope, on living specimens, I refer to the observa- 

 tions and the fine figures published by Mr. Loew in Linn. Entoyn. 

 Yol. Y, p. 400, Tab. II, fig. 19, 20, 21. They are taken from 

 three fossil species, found in amber, which apparently belong to 

 the genus Elephantomyia. The palpi of E. westwoodi resemble 

 Mr. Loew's fig. 20 most. 



