29(5 [November, 



Head : eyes contiguous, naked ; arista almost bare ; face silvery-white, very 

 slightly prominent. 



Thorax shining black, unstriped, having four bristles behind the suture in each 

 medio-lateral row ; sides setose. Scutelhim black. 



Abdomen ash-grey, ciliated with long soft liairs on both edges and middle of 

 segments ; first segment black at the base, from which extends a longitudinal black 

 stripe down the dorsum, which is dilated into a triangular black spot on the second 

 segment, the apex of the triangle being backwards, and ending in a narrow line 

 passing over the third and fourth segments ; anal appendages small and shining, 

 black. 



Wings hyaline ; transverse veins rather near together ; external one slightly 

 oblique, and a little sinuous ; third and fourth longitudinal veins running almost! 

 parallel to each other towards the apex. 



Calyptra yellowish-white. Hal teres dingy yellow. 



Legs black ; anterior femora with a single sharpish tooth on the under-surface 

 near the end ; anterior tibia narrowed at the base, and with the lower two-thirds 

 thickened and shortly ciliated on posterior surfaces ; middle femora armed on under- 

 surfaces near the base with two or three strong blunt bristles ; middle tibiae furnished 

 along the whole of their external surfaces with numerous minute erect spines, some- 

 what similar to those found in H. dentipes ; posterior femora with two straight 

 blunt hairs, placed near to each other, on the undor-surface, exactly in the middle j 

 posterior tibia? with a small rigid pencil of about three long hairs, converging to a 

 point on their anterior surfaces a little before the middle ; a few short soft hairs are 

 placed on both inner and outer surfaces near the apex. 



I do not know the female. 



This species bears a very close general resemblance to H. arrnipes, with which it 

 has evidently been confounded. Zetterstedt says in his description of the latter, 

 " variat <? femoribus posticis subtus in medio setulae gemmae." Besides the points 

 of distinction which I have mentioned between these two species, I may add that 

 the poisers are fuscous in H. arrnipes, and yellow in IL.fascieulata ; the wings are 

 slightly brown in H. arrnipes, and almost white in II. fasciculata ; and lastly, the 

 anterior tibiae are slightly bearded with some long hairs on their under-surfaces in 

 H. arrnipes, while they are only ciliated with short hairs in H.fasciculata. 



This little fly is generally distributed. 



(To be continued) . 



NOTES ON TENTHBEDIKIDA1. 

 BY J. E. FLETCHER. 



The (§ of Hemicliroa aim has hitherto been reputed very rare* 

 My experience of the species is very limited, as I have bred onlj 

 nineteen specimens, four in August, 1880, and fifteen in May last; 

 but of these, two of the former, and eight of the latter were $ — thu| 

 outnumbering the $ by one. 



