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P. NIGRITARSIS, Zett. 

 Rondani places this species in his genus Anthomyia, but in numerous examples 

 which I have examined I have always found the scales of the alulets very small and 

 equal in size. This closely resembles P. bicolor in shape, colour, &c., but differs in 

 being usually rather smaller ; in having black tips to the palpi ; the eyes of the 

 male contiguous ; the frontal space mostly red in the males, and always brightly so 

 in the females ; and the fore femora always grey on their upper surfaces in the 

 females. Schiner evidently confounds this species with A. fulgens of Meigen, but 

 the latter (of which I have not seen a British specimen) has the seutellum yellow, 

 not grey, as in P. nigritarsis. This fly also feeds in the larva state upon dock leaves ; 

 I have bred many specimens from those of Rumex ohtusifolins. On one occasion, 

 several individuals of this species, as well as some of P. bicolor, emerged from pupse 

 formed in the same leaf. 



P. EXiLis, Meig. 

 This closely resembles the two preceding species, but differs from them both by 

 having the palpi entirely black ; the antennae have the bas-al joints yellow. Rare : 

 I bred a single specimen last year from a leaf of Heracleum sphondylium. 



P. YERSICOLOK, Meig. 

 In shape and general appearance this species closely resembles P. bicolor, but 

 may be distinguished from it by having the palpi entirely black ; the antennae are 

 also black, by which it may be known from P. exilis. ISiot very uncommon. 



P. TLATIPES, Fall. 

 This little fly differs from P. llcolor, as well as from most of the other preceding 

 species, by having the forehead flat, and the abdomen thin and depressed, instead of 

 being sub-cylindrical. It has the arista pubescent ; the palpi yellow (sometimes 

 darkened at the extremities) ; the thorax sub-testaceous ; the abdomen livid, with 

 large sub-anal processes ; and the four posterior femora with black rings round their 

 extremities. Rai'e : only the male has been described. 



P. VITTIGEEA, Zett. 

 This species differs from all the preceding by having the thorax always pale, as 

 well as the abdomen. The colour of the former varies from light yellow to rufo- 

 testaceous, and it is marked dovra the dorsum with a broad grey stripe. This fly 

 closely resembles P.Jlavipes in most points, having among others the posterior femora 

 annulated with black at their extremities. Zetterstedt captured a female in union 

 with a male of P. flavipes, and I am inclined to think that they are both varieties of 

 the same insect. Rare : I captured a single female at Windermere in June, 1874. 



P. EOTUNDICORNIS, Zett. 

 This is an aberrant species, peculiar by having the eyes of the male, as well as 

 those of the female, separated by a considerable interval. The antennse are short, 

 with the third joint orbicular, and with the seta elongated and bare ; the thorax is 



