74 [September, 



The alulets are large and milk-white. The wings have the external transverse veins 

 oblique, and, as well as the internal ones, slightly clouded. The third and fourth 

 longitudinal veins are parallel and curved backwards. 

 This flj seems very rare. 



C. nuMiLis, Meig., Eond. 



This pretty little species, which is about 3 mm. in length, has the male abdomen . 

 cylindrical, clubbed at the apex, and marked by six brown spots, as well as by a 

 central row of small oblong marks. The antennae and palpi are black ; the arista 

 is long and sub-plumose (Meigen says that it is bare, but the hairs are pale, very fine, 

 and difficult to see) ; the legs are black, with the exception of the tibiae and meta- 

 tarsi, which are testaceous. The female closely resembles the male, except by the 

 shape of the abdomen. 



I found several specimens of this small fly at Buckingham in August, 1884. 



C. SEXMACULATA, Meig. 



This is also a well-marked little species, rather smaller than the last, which it 

 closely resembles, the abdomen being marked in a similar manner ; it differs from 

 it, however, by having the legs wholly black, with the exception of the bases of the 

 fore tibiae, which are testaceous. The venation of the wings is also slightly different 

 in the two species. Eondani has pointed out that in C. hum His the distance between 

 the two transverse veins is equal to that of the external one from the point of the 

 fifth longitudinal vein, and we find that in C. sexmaculata the external transverse 

 vein is nearer to the end of the fifth longitudinal than to the internal transverse 

 vein. 



I found a single male in my gai'den near Bradford, on April 2-±th, 1886. 



MACIIOECHIS, Eond. 



M. MEDITATA, Fall. 

 I captured a female of this rare species in my garden in July, 1886 ; previously 

 I only knew the male. It closely resembles the female of C. tigrina in shape, size 

 and markings, but differs by having a pubescent instead of a plumose arista, and by 

 the abdomen being without the longitudinal central marks on the dorsum between 

 the lateral spots, which arc generally seen in C. tigrina. 



C^NOSIA, Meig. 

 C. SCEUPULOSA, Zett. 

 pacifica ?, Meig. 

 This species, of which the female only has been described, differs from C. tri- 

 aiigula, Fall., by having the thorax marked only by one central longitudinal brown 

 stripe instead of by three broad confluent ones, and by having the eyes placed nearer 

 together. I captured two females at Buckingham, in August, 1884. 



C. PiCTiPENNis, Lw., et Schin. 

 Sapromtza costata ?, Meig. 

 Oechisia costata, Eond. 

 Mr. Dale sent me two specimens of this curious little species (the generic position 



