RHAMPIIIDIA. 103 



is still more abruptly turned towards the costa, its latter section 

 assuming the appearance of 



a cross-vein ; the prsefurca is Fl S- 2 * 



almost in one line with the 

 third longitudinal vein ; the 

 second posterior cell is square 

 at the basis and not attenu- 

 ated ; a trace of a brownish 



cross-band is distinctly perceptible along the central cross-veins ; 

 the cross-veins at the basis of the two intermediate posterior cells 

 are likewise infuscated. The following details not being dis- 

 tinctly visible in my specimen are copied from the description of 

 Mr. Loew : " Palpi short, first joint short-cylindrical, the second 

 a little longer, somewhat incrassated, ovate ; the third of about 

 the same length, more slender, cylindrical, the last joint perceptibly 

 longer than the preceding, styliform ; the whole palpi are beset 

 with stiff, scattered hairs. The antennae are not quite as long as 

 head and thorax taken together ; first joint elongated-cylindrical, 

 the second pyriform, not very stout ; the 14 joints of the flagellum 

 are ovate, of diminishing length and stoutness, beset with short 

 hairs and with longer verticils near the basis. The ovipositor is 

 very short and ends in two sharp points." 



The resemblance of the venation of Styringomyia to that of 

 Toxorrhina is very striking, and shows itself in the course of the 

 first and of the second longitudinal veins. If we suppress the 

 section of the latter vein which runs towards the costa, we obtain 

 a venation almost exactly similar to that of Toxorrhina. Whether 

 this resemblance is indicative of relationship I am not prepared 

 to say. 



Gen. VI. RHAMPH5DU. 



One submarginal 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 vein ; the subcostal cross-vein is close at this tip. 

 Rostrum elongated, but shorter than the thorax; last joint of the palpi 

 elongated. Antennae 16-jointed. TibiaB without spurs at the tip; em- 

 podia indistinct ; ungues smooth. The forceps of the male very like that 

 of Elephantomyia. 



The rostrum of the European R. longirostris is longer than the 

 head and about equal to the distance between the collare and the 

 root of the wings ; that of the North American species is but 



