168 tJuly. 



fork moderate, 1st thin vein gently curved at its origin from the fork ; hind 

 legs brown, middle and front ones more yellow ; hairs underneath hind femoi-a 

 well developed on basal half ; tibial cilia strong. If mm. 



Two females of this very distiuct species have been taken, the first 

 on the 22nd of June, 1911, at Mainswood, and the other a week later 

 at the same locality. It resembles in some respects both idiginosa and 

 infraposita, but is quite distinct from both. From nligitiosa it may be 

 known at once by the much narrower frons and the differences in its 

 chsetotaxy ; by the differently proportioned costal divisions, the second 

 division in uliginosa being three times as long as the third, instead of 

 barely half as long again, and by other small distinctions. From 

 infraposita it is distinguished by the absence of any reddish tinge on 

 the thorax ; by ihe still narrower frons ; and the position of the inner 

 bristle of the lower frontal row, away from the eye margin and not 

 close to it, as in ivfraposita, by having only one pair of supra-antennal 

 bristles, which are not widely separated ; 1)y the much darker hind legs, 

 shorter costal fringe, and larger size. 



HyaUpennis, sp. n. This belongs to the small group of half a 

 dozen species, characterised by having bristly pleurae, blackened 

 halteres, and thickened front tarsi, and it should occiapy a position 

 between Jiumilis and aUicolella, having some of the characteristics of 

 each. From both it is best distinguished by its quite clear wings 

 (hence its name) with their very fine and delicate thin veins ; by its 

 darker, almost black, legs ; and also by the front tarsi being black and 

 in marked contrast with the pale tibiae. With humilis it agrees in the 

 length of its costa, and in having three or four strong bristles under- 

 neath the hypopygium on each side, but is without the three or four 

 diagonal ones present on the sides in that species. With aUicolella 

 it agrees in the absence of a bend in the middle of the underside of 

 the hind femora ; in the ciliation underneath these femora, though 

 more distinct than in aUicolella, being of the usual character and not 

 short and stubby as in humilis ; and in the marginal bristles of the 

 last abdominal segment being well developed, as well as in the absence 

 of any special hairiness on the sides of the last two or three segments. 

 It is rather smaller than either. 1^ mm. 



Upwards of a dozen, inclusive of both sexes, were swept amongst 

 bracken on high ground in Stoke Park, between the 4th and 21st of 

 October, 1909, and a specimen or two were met with again the follow- 

 ing autumn in Stoke Wood. 



Unguicularis. Mr. Collin has been fortunate enough to take 

 more than one female of this scarce species. It has blacker legs than 



