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Vol. XXIX. LONDON, MAY, 1897. No. 5. 



CALLIMORPHA AGAIN. 



Larva of Haploa fiilvicosta and notes on the male ge?iitalia. 



BY HARKISOM G. DYAR, PH. D., NEW YORK. 



The difficulty of defining species in this genus is increased by the 

 constancy of the local forms or races. I have elsewhere referred {Ent. 

 News, VII., 218) to the race oi fitlvicosta which Mr. O. D. Foulks has 

 discovered at Stockton, Md. Mr. Foulks was so kind as to send me 

 over 100 hibernated larvc^, from which I bred a long series of moths. 

 The type form is large, the size of reversa and colona, both wings imma- 

 culate yellowish-white, head, collar and the tips of the abdominal rings 

 ochre- yellow. 



In var. A the fore wings are nearly pure white, the hind wings much 

 yellower, suggesting conscita, though never so dark as that form. 



In var. B the ground of fore wings is white, marked faintly with 

 ochreous bands in which the full pattern of colona can be traced ; the 

 costa is narrowly brown-black ; the hind wings are pale ochreous. This 

 looks like a washed-out colona, related to it in the same way as var. A. is 

 to conscita. 



Var. C is only slightly yellowish on both wings, the hind wings 

 scarcely at all darker ; fore wings marked with various streaks and spots 

 of brown-black, especially along the costa and margins, all more or less 

 distinctly connected by ochreous shades, in which the full pattern of 

 reversa can be read. This is a washed-out reversa, stained with the 

 creamy yellow so characteristic of the Maryland race. 



All these forms insensibly intergrade. I believe that this is prac- 

 tically the extent of variation in this Maryland race. There are no 

 specimens that are true colona, conscita or reversa, but these forms are all 

 strongly suggested. The view naturally presents itself that these names 

 apply to local races rather than to distinct species. In his work on 

 Callimorpha (Proc. U. S. Nat. Mus., 1887, p. 338) Prof. J. B. Smith 

 describes the genitalia of colona, Lecontei, coniigua, reversa and vestalis. 

 The differences shown are at best slight, and Prof Smith assumes the 



