Acentropus. 149 



are a slight difference in the length of the antennas, 

 some difference in colour and size, and the broader, 

 rounder wings. " Both sexes with ample wings ; by its 

 colour, shape of wing, &c,, a good species,'^ says Nolcken. 

 Herrich-SchiiflPer figured the original specimen, but his 

 figure does not throw much light upon the subject: he 

 mentions, however, that the palpi [of the ? ] are much 

 shorter than in niveus [c?], the legs so far anomalous 

 that the tibiae of the four hindmost and the tarsi of the 

 middle ones have long hairs [this is not peculiar to lati- 

 jpcnnis] , and the thighs of the hindmost pair are only a 

 little shorter than their tibias; also the antennae are 

 shorter, thinner, and scarcely perceptibly ciliate. I can- 

 not find any published description of the male of A. lati- 

 •pennis. Milliere's figures are too small to be of much use, 

 and they are erroneous in the neuration of the hind- wings ; 

 but they are characteristic, and show the difierence 

 in the shape and outline of the wings very well; I 

 imagine, however, that his fig. 21 repi'esents a ? lati- 

 pennis. The only recorded locality on the Continent for 

 A. latipennis is Sarepta, on the Volga; but Eaiaggs has 

 introduced the name into his 'British List,^ manifestly 

 considering it to be identical with the Hampstead form 

 with the winged female. And of this, I think there is 

 no doubt. An examination of the specimens sent by 

 Staudinger shows that the female latipennis is only our 

 old friend, the Zancle Hansoni of Stephens ; in other 

 words, Moschler's insect is identical with our London in- 

 sect with the amply- winged female. 



To slight differences in colour and size, I attach no 

 importance. Hagen mentions that the colouring of the 

 male Acentropus is variable in Prussia, the fore-wings 

 being sometimes more and sometimes less flushed with 

 brown (Stett. Ent. Zeit. 1859, p. 203), and he refers (ih. 



1870, p. 316, n.) to specimens from Eussia and East 

 Prussia which had the wings marked with brown. Teng- 

 strom (Not. Faun. Fenn. Forh. 1869, p. 324) says that 

 Renter captured specimens of A. Nevce which in colour- 

 ing resembled latipennis. And Ritsema (Tijd. voor Ent. 



1871, p. 34, n.) reports that " the colour varies between 

 snow-white and gray." I have not seen any specimen 

 which could be appropriately described as snow-white; 

 but I do observe differences both in colour and size in 

 our English insects. These differences, however, do not 



TRANS. ENT. SOC, 1872. PART II. (MAY.) M 



