220 [March, 



P. EXIGUA, sp. n. 



Mas, nigresceiis, oculis coherentihus ; thorace suhUneato ; abdomine hirsuto, 



lineari, depresso, canda incrassata, lineaque interrupta, et incisnris transversis sig- 



nato ; nervis transversis suhapproximatis ; tibiis posticis intus ciliatis. 



Long. 2 mm. 



This little species bears a very considerable resemblance to P. ignota, the abdo- 

 men being marked much in the same way ; it differs from it, however, by being 

 smaller, in having the abdomen narrower and more thickened at the extremity, the 

 calyptra smaller, the third and fourth longitudinal veins nearer together and quite 

 parallel, the transverse veins nearer together, and the hind tibiae ciliated. 



Bead: eyes contiguous ; face and epistome slightly pi-ominent ; antennse rather 

 short, the third joint being scai-cely twice the length of the second ; arista bare, and 

 with an oval, shining black, thickened protuberance at its base. 



Thorax dull schistaceous-grey, with the sides paler in colour, marked with three 

 or five rather indistinct longitudinal black stripes. 



Abdomen hairy, oblong, narrow, attenuated at the base and thickened behind ; 

 it is marked on the dorsum by a narrow, interrupted, black, longitudinal band, with 

 transverse lines, and a number of small black spots round the roots of the hairs ; the 

 apical segment is large, double, projecting, and of an ash-grey colour ; the sub-anal 

 processes are large, and consist of two pairs of lamellae, one pair projecting from the 

 apex forwards, and the other pair (which are placed towards the middle of the 

 belly) extending backwards. 



Wings slightly fuscous, with the first and second longitudinal veins, as well as 

 the costa, black and rather thickened ; the third and fourth longitudinal veins are 

 placed rather near together, and are quite parallel to each other ; the transverse veins 

 are also somewhat close, and the external one is straight and upright ; there is no 

 costal spine. 



Calyptra very small, and of a brownish- white colour. Halteres yellowish-brown 

 and sometimes nigrescent. Legs, with the hind femora, furnished beneath with short 

 soft hairs along the basal half, and with longer ones towards the extremity ; hind 

 tibiae ciliated with a few bristles of irregular lengths on the middle part of their 

 inner surfaces. Female unknown. 



I captured several specimens of .this fly at Silverdale, Lancashire, in May, 1881. 



{To be continued) . 



BILAR JAPONICUS, n. sp. 



BY ROBERT McLACHLAN, F.R.S., &c. 



i . Head, above, shining yellowish-testaceous, much elevated, with a median 

 longitudinal impressed line ; the three piliferous warts very large (the lateral ones 

 the largest), the hairs yellow : face shining brownish : antennce pale yellow, about 

 30-jointed, each joint, from the 3rd to about the 21st, with a strong clavate branch, 

 mostly very long, but shorter towards the base and apex of the antennae ; 3rd joint 

 with an inner tooth immediately below the branch ; the 6 or 7 apical joints 

 short and nearly moniliform. ^ 



