250 [AP'^*' 



LIMNOPHOEA, Desv. 

 L. ALBiFRONS, Eond., non Zett. 



This species differs from all the other true Limnophorm with which I am ac- 

 quainted by having yellow tibise. Eondani knew only the male, I have had the 

 pleasure of finding the female, which agrees very closely with Rondani's description, 

 but differs in a few points, which I will now give. In the male only the four pos- 

 terior tibiae are yellow, the front ones being black with yellow bases. In the female 

 all the tibiae are entirely of a clear yellow colour. In the male Rondani says that 

 the thorax is grey and immaculate {unicoloria) ; in the female it is grey, very pale 

 in front and on the sides, and marked on the dorsum with several short black stripes 

 or marks. The abdomen of the female, like the male, has each segment marked by 

 two large spots, which in my specimen are subquadrate in form. 



The head in the female has the eyes separated by a space which occupies about 

 one-third of the width of the head, it is deep black, quite straight on the sides, and 

 has a spot on the forehead with a stripe on each side white, like the face. 



Rondani does not give the size of the male ; my female specimen measures 

 about 4 mm. in length. 



I captured a single female of this well-marked and interesting species at Conis- 

 head Priory, near Ulverston, Lancashire, on August 2nd, 1886. 



L. SOLITAKIA, Zett. 



This species was placed in my list in the genus Ccenosia, but upon close exami- 

 nation I find that it possesses the true characters of a Limnophora ; thus, the eyes 

 of the male, though rather widely separated, are still nearer together than in the 

 true CcenosicB, the space between them not measuring more than a fourth or a fifth 

 of the width of the head, while in the Ccenosia it will measure at least a third ; 

 besides this, there is another and more important character of distinction, for the 

 inner sides of the eyes in the males are convex in this species, as in other Limno- 

 phorce, being nearer together in the centre than they are above and below ; while in 

 the CanosicB they are straight, leaving the intraocular space of an even width 

 throughout in the males, as is the case in most female AnthomyiidiB. 



HYDEOT^A, Desv. 

 H. siMiLis, sp. n. 



Man, niger nilidux ; thorax in fronts hreviter alio .striatus ; abdomen alhidum- 

 paUinosum,parceJ'uso-tessellatum,linealongitndinalitemd nigra; oculi nudi sub- 

 coniigtii ; aJte basibus marginibusque anticis fuscce, venis longitndinalibus 3*'" et 4'^* 

 inflexis ; femora antica subtus bituberculata ; tibia anticee imbarbatm ; tibice postica 

 callo tomentoso apicali destitiitre. Long., 9 mm. 



This species bears such a close resemblance to the common and well-known one, 

 H. dentipes, that I shall very briefly describe it, chiefly dwelling upon those points 

 in which it differs from that species. 



