190 



THE CANADIAN ENTOMOLOGIST 



Fig. 20. — Venation of Apophlhysis pullata 



Legs pale yellowish white, except the anterior tibiae and tarsi, 

 which are dark brown externally. 



Expanse: 9-9.5 mm. 



Two males, Cincinnati, O., July 13, and Balsam, N. C, July 22. 



The erect tuft and position 

 of the antennal flaps which 

 project obliquely forward in 

 the dead insect give this 

 species a very striking 

 appearance. 

 Apophthisis, new genus. 

 Head with appressed 

 scales, antennae somewhat 

 under 1, basal segment with 

 pecten. Labial palpi moderate, straight, drooping. Maxillary 

 palpi rudimentary. 



Posterior tibiae with a row of short projecting scales above. 



Fore wings lanceolate, the margin from the inner angle to the 

 apex is almost straight or slightly concave; 2 almost obsolete, 

 3 absent, 4 indistinct, from lower angle of the cell, 5 absent, 6 

 and 7* stalked, transverse vein indistinct between 4 and 6, 11 

 obsolete except at origin and near costa. Hind wings about 14, 

 lanceolate, cillia 5; 5 and 6 stalked. (Fig. 20). 



Type: Apophthisis pullata. 



A very peculiar genus, apparently most closely allied to 

 Stomphastis Meyr., with which it agrees in some characters. The 

 loss of vein 5 of the fore wings is a feature not found elsewhere in 

 the GracilariadcB, where modification usually results in the loss of 

 vein 6. 



In any group it is possible within certain limits to determine 

 which veins are absent, if the primitive type of colour pattern 

 is known. Elsewhere f it was shown that the tips of veins mark 

 the extremities of unpigmented (white) fasciae, separating the primi- 

 tive transverse bands of colour. Thus, in Lithocolletis, the primitive 

 colour pattern consists of a series of seven transverse bands, separ- 



*In the specimen denuded, 7 is branched near the costa, as shown in the 

 figure; this is probably an individual abnormality. 



fBraun. Evolution of the colour Pattern in the Microlepidopterous Genus 

 Lithocolletis, Jn. Acad. Nat. Sci. Phila., XVI, 10.5-167, 1914. 



