H83.] 11 



leaves of Arctium lappa, upon wliich the larvae had fed. The male bears a conside- 

 rable resemblance to that of P. betcp : the fa^e is rather prominent ; eyes contiguous ; 

 antennae rather short, entirely black ; palpi yellow, with black tips ; thorax dark 

 grey, very indistinctly striped ; abdomen narrow, sub-cylindrical, light grey, with a 

 very slightly marked dorsal longitudinal stripe and large projecting sub-anal pro- 

 cesses of a reddish colour ; the fore legs have the femora and tarsi black, and the 

 tibiae only red ; the four posterior legs have the femora, as well as the tibiae, red. 

 The female has the face more prominent than that of the male, and, together with 

 the forehead, cheeks, and basal joints of antennae, of a bright yellow colour. The 

 thorax and abdomen are both immaculate and light grey ; the legs have all the 

 femora and tibiae yellow. Rare : besides the pair which I received from Mr. Inch- 

 bald, I have two females which I captured at Windermere in 1874. 



P. HTOSCTAMI, PaUZ. 



In this species the abdomen is usually described as being of a light grey colour, 

 especially in the male ; but it will often be found to have a pale testaceous tinge in 

 both sexes, when it corresponds to the C. chenopodii of Rondani. The back of the 

 abdomen is marked with a longitudinal row of narrow triangular spots in both males 

 and females, very similar to those seen in P. heta. The palpi are yellow with black 

 tips ; the basal joints of the antennae are yellow ; and the legs have all the femora 

 and tibiae pale, with the exception of the fore femora in the male, which are partly 

 grey. This rare species is said to feed in the larva state upon the leaves of the 

 henbane, and Rondani says that he has bred the pale bodied variety from those of 

 the deadly nightshade {Atropa belladonna), as well as from some species of Ckeno- 

 podium. 



P. H^MOEEHOUM, Zett. 



The female of this species closely resembles that of P. conformis, but differs in 

 having the last two segments of the abdomen red or yellow. The palpi are yellow 

 with black tips ; the antennae are wholly black in all the specimens that I have seen, 

 but Zetterstedt says that they are often red at the base ; the fore femora are black 

 or grey, but all the others, as well as all the tibiae, are yellow. Zetterstedt only 

 knew the female when he published his description in the 4th vol. of the Dipt. 

 Scand. ; but in the 14th and Supplementary volume of the same work he gives a 

 very imperfect account of the male. In several specimens which I possess of that 

 sex, the abdomen is sub-cylindrical, entirely grey, having dark reflections, but no 

 distinct markings ; the anal segment is incurved, grey, with two projecting processes 

 of a black colour ; the eyes are sub-contiguous ; the forehead prominent ; the an- 

 tennse wholly black as well as the palpi ; the legs are coloured as in the female, but 

 the fore femora are only black at their bases. This species is not uncommon near 

 Bradford, but the females are more frequently met with than the males. 



P. EUFIPES, Fall. 



Only the male is known of this species, which is one of the most highly de- 

 veloped in the genus, the scales of the alulets being of considerable size, and the 

 abdomen widened. The antennae and palpi are black, the latter, however, being 

 sometimes pale at their bases ; the legs are entirely rufous, with the exception of 



