266 [May, 



phoria altogether, placing H. conica and H. linogrisea in Hylemyia, 

 and removing H. divisa into the unspotted division of his genus 

 Spilogaster (Mydaa). While, however, some of the more highly de- 

 veloped species of this genus are closely related to some of those in 

 Hj/drojihoria, many of the others are very feebly organized, having 

 very small alulets and narrow flattened bodies. 



The arista should always be distinctly plumose or hairy in all 

 species placed in this genus, but there are a few in which the hairs 

 though distinct are short, and some of these have been placed by one 

 author in one genus, and by others in another, thus creating a good 

 deal of confusion: H. antiqua sm& pullula, for instance, are included 

 by Schiner in his great genus AntJiomyia, along with H. cardui ; while 

 Rondani places them more correctly in the present genus. 



H. hilaris, Fall. 

 This fire well-marked species is rare. I have only seen one British example, 

 which was sent to me by Mr. B. Cooke, of Southport. 



H. yirglnea, Meig. 

 This large species is also rare. I captured a single male in August, 1873, at 

 Tirgewick, near Buckingham. The legs, though black, have all the knees as well as 

 the bases of fore tibiae pale. 



H. YAKIATA, Fall. 

 This little species, which abounds everywhere, may be recognised by its narrow 

 conico-cylindrical abdomen, marked by a slender longitudinal dorsal stripe, which 

 becomes attenuated towards its extremity ; and by the arista being furnished with 

 very long but few hairs. The thorax is striped by three, or rather five longitudinal 

 black bands, which are more distinct in the female than in the male The forehead 

 is prominent, the eyes contiguous behind in the latter sex, but rather widely sepa- 

 rated in the former, the frontal space being rufous at its fore part. 



H. lasciva, Zett. 



This species is almost as common as the last, and is often confounded with it ; 

 it differs, however, by being rather smaller, much blacker, and more hairy. The 

 thorax is indistinctly striped ; the abdomen is flat and oblong, not conical ; the sub- 

 anal processes are much larger ; the dorsal stripe is wide and of equal width over 

 each segment, except the last, on which it is indistinct ; the head is round, and the 

 forehead less prominent than in H. variata ; the arista is very similar. 



Length, about 4 mm. (2 Lin.). 



H. flavipenkis, Fall. 

 In this species the arista is long and thickly haired ; the proboscis is thick and 

 fleshy, especially in the female ; hence the name given to it by Meigen, who only 

 knew that sex. The thorax is nearly black and indistinctly striped ; the abdomen 



