J l^i r December. 



their tips darkened ; hind tarsi all black, the tooth under the basal 

 joint longer than in S. pallipes, and more ciliate at its end ; the front 

 coxfie are yellow, with the base grey, the arista is slightly dorsal. In 

 the female, the arista is conspicuously dorsal, thus readily distinguishing 

 it from any species which has the second joint of the antennae pro- 

 truded into the third ; it is also smaller than the male, with all the 

 femora yellow, 



XiPHANDRiUM. — Of this geuus, calif/inosum and appendiculatum 

 seem very common ; these two and monotrichum have the frons blue 

 in both sexes, but the black bristles on the coxa; of the last are 0, 1, 1, 

 and in the others 2, 2, 1, thus easily distinguishing the female of 

 monofricJium. I have only found monotrichum in the Xew Forest; 

 hrevicorne, which I have caught at Penzance and Bournemouth, has 

 the frons glossed with white in both sexes, and no black bristles on 

 the coxae ; fasciatum and Jissum I have not seen, but I have found 

 one species new to Britain, in : 



X. AUCTUM, Loew, of which I caught one male at Lyndhurst on 

 June 23rd, 1873. It is closely allied to monotrichum, but the appen- 

 dages have not the long solitary hair, the joints of the tarsi differ 

 slightly in relative length, it is half as large again, and in my specimen 

 I make out the black bristles on the coxae 3, 1, 1. It has previously 

 been recorded from Germany and Austria, but is not well recognised. 



PoRPUTROPs PECTiNATUS, Lw. — I capturcd a male and two females 

 of this near Kew in 1869 ; it is a well marked species, with a black 

 face and beard, broad frons, front coxae with black pubescence, binstles 

 behind front femora strong and regular, all black, the basal joint of 

 the front tarsi neai'ly twice as long as the second joint, the hind femora 

 yellow, with the apical fourth black, the hind tibiae yellow. 



P. coxsoBRiKUs, Zctt. — In this species, the face is silvery.whitc, 

 the beard white, the frons rather narrow, the front coxae with white 

 pubescence, and the bristles on the front femora less strong and 

 regular than in pectinatus, and with some pale hairs intermixed behind ; 

 the basal joint of the front tarsi is stout and slightly longer than the 

 second, the other three short, the second is a little bent, and thick at 

 the base, with minute erect hairs beneath, the middle femora are thin 

 with fine pale pubescence beneath, the hind femora are all black, the 

 tibia? dusky, blackish at tip ; tarsi much shorter in proportion than in 

 pectinatus. The female differs from that of peciinatus by the duller 

 yellow, nari'ower face and frons, and white beard. 



(To be contiiiuedj. 



