18S7.J 55 



throughout its entire length, while in P. cepetoruni it is only slightlj' hairy for a 

 short distance beyond the thickened base. The fronto-orbital bristles* are differently 

 arranged in the two species. In C. cinerea the upper series (three in number) is 

 placed on an outer line to the lower series, and turns outwards ; the bristles in the 

 lower series are also much smaller than the upper ones, are five or six in number, 

 and turn inwards. In P. cepetorum the bristles in the upper and lower series form 

 one extended, though curved, line ; they turn, however, in opposite directions as in 

 the other species, but there is less difference in size between the bristles in the two 

 series, and those in the lower one are only three (sometimes four) in number. The 

 edges of the second and third abdominal segments have larger and longer bristles in 

 C. cjwerea than in P. cepetorum; the wings also differ in the two species — in C. 

 cinerea the third and fourth longitudinal veins are slightly divergent at their ex- 

 tremities, while in P. cepetorum they are quite parallel, and the third reaches the 

 border exactly at the apex of the veing, while in C. cinerea it ends a little before 

 the apex. 



The males belonging to C. cinerea are still unknown to me. 



C. LONGULA, Fall. 

 Zett., Schin., Rud., non Meig., nee Macq. 

 This is a well-marked little species, of which I have only seen a single male, 

 which was given to me by Mr. Brunetti, and captui'ed by him at Balham in August, 

 1885. It has a narrow cylindrico-conical abdomen, marked on the dorsum with a 

 longitudinal row of narrow triangular spots. The thorax has two dark longitudinal 

 lines on the dorso-central region placed rather widely apart, which are formed by a 

 series of brown spots surrounding the roots of the outer row of the dorso-central 

 bristles. The characteristic peculiarity of this species, however, is the clouding of 

 the transverse veins of the wings, by which it somewhat resembles Hylemyia 

 pidlula, Zett., and with which it was confounded by Meigen and Macquart. The 

 face and forehead are not very prominent in this species, so it will come under my 

 second section. Eondani has remarked tliis, but Schiner has fallen into the error of 

 placing it next to C. buccata. 



PHORBIA, R. Desv. 

 P. BiscRETA, Meig. 

 Mr. Yerrall has recorded the capture of this species, of which he kindly sent 

 me specimens. It is well marked, characterized by the eyes of the male being 

 rather widely separated (sub-contiguous), by the thorax being striped with five 

 rather indistinct lines, by the abdomen being flat, having brown reflexions, being 

 marked by an interrupted longitudinal dorsal band, and black transverse lines, and 

 by the wings being brunescent. 



P. TETULA, Zett. 

 Mr. Verrall has also recorded the capture of this species, but, as he remarks, 

 there is some doubt respecting it. I think it is probably an undescribed species. 



* See Osten-Sacken's " Essay of Comparative Chajtotaxy." 



