jgg [September, 



Fallens. — A very distinct looking species, of which I took a single 

 male at Westhide 21/6/05. Two others, I hear from Mr. Collin, are 

 in Mr. Verrall's collection, taken by Colonel Yerbnry at Porthcawl in 

 1906. Here again the insect seems out of place among the species 

 associated with it, and reminds one much more of some of the forms 

 in B, the Section with 4 bristles to the scutelliim. And should the 

 female be fomid to have four scutellar bristles, as is not altogether 

 unlikely, the species would have to be moved into that Section, where 

 it would fall in beside alhicans and rata, both of which have a shortish 

 arista and other characters in agreement with it. 



Sphiata. — A single male, taken in Stolce Wood 17/9/07. Its great 

 feature is the very large and conspicuous pleural bristle, the natiire of 

 which will be referred to later on in the remarks on pectoralis. Other 

 characters deserving attention are the distinctly ciliated hind tibiae and 

 the long anal organ. 



Serrata. — This again is another very distinct little species, which 

 I have had no scruple in describing on a single male, taken in the 

 garden 10/7/06. The dilated terminal joint of the fore tarsi is its most 

 prominent and distinguishing characteristic, though equally important, 

 were they not so microscopic, would be the serrations under the hind 

 femora. Both, however, may be purely male chai-acters (the first 

 certainly is so), and the recognition of the female would depend, 

 mainly upon the small and closely approximated supra - ant ennal 

 bristles, and the hyaline wings with their colourless thin veins. 



Verralli. — This interesting insect was discovered by Mr. Verrall, 

 after whom I have the pleasure of naming it, at Swanage ; a male 

 being captiired 6/9/06 and two females 4/9/06. The hind margins of 

 the abdominal segments, narrowly T)ut conspicuously whitish, and alike 

 in both sexes, catch the eye at once, and distinguish it from any other 

 species I am acquainted with. 



Latifrons. — Described from five males in my collection, taken in 

 such widely separated and for the most part wet locahties as Stoke Wood, 

 Shobdon Marsh, the Monnow, and Middle Park Pool, four of them in 

 July and one in October. Eecently I received from Colonel Yerbury 

 both sexes of a form which I was at first inclined to treat as a distinct 

 species under the name of yerhtiryi, but now think it safer to consider 

 as a variety of latifrons. The chief almost the only distinction lies 

 in the form of the hypopygium, which is not produced below into 

 a point and also wants the little bunch of hairs characteristic of tlie 

 type. The other and less important difference is the paler halteres — 



