Dec, 1904] Dyar : Notes on Mosquito Larv^. 243 



ment of the wing, though described from T. plastographus applies 

 equally well to the Bruchidse {Bnuhiis sp. ) and to certain of the Bu- 

 prestidse as well as to D. valens. 



With the growth of the wing downward there is a corresponding 

 pushing upward of the invagination at the lower edge thus bringing 

 the wing outside the body, between the hypoderm and the cuticle, 

 while the increase in the size of the body keeps pace with the growth 

 of the wing, so that, although the wing is constantly growing down- 

 ward and increasing in length, it does not push past the spur or pro- 

 jection in the hypoderm below it until that disappears by the stretch- 

 ing of the hypoderm, late in the prepupal period. 



( To be continued.^ 



Class I, HEXAPODA. 



Order IV, DIPTERA. 

 BRIEF NOTES ON MOSQUITO LARVAE. 



By Harrison G. Dyar, A.M., Ph.D., 



Washington, D. C. 



Larva of Anopheles barreri Coq. — Mr. H. S. Barber originally 

 obtained eggs of this species at Plummer' s Island, Md. , and turned them 

 over to the Bureau of Entomology, from whence I received them and 

 carried one to the last stage. This was late in the fall and the larvae 

 were lost over winter. Their actual occurrence was unknown to us. 

 Last summer Mr. F. C. Pratt had the good fortune to discover the 

 larvae in water in hollow trees at Trapp, Loudon Co., Va. (July 25, 

 1904). They were taken in charge by Mr. F. Knab, who informs 

 me that in addition to feeding with the mouth brushes in the usual 

 way, the larvae were predacious, seizing Culex larvae with great activity. 

 This remarkable habit for a larva that can exist on a vegetable diet 

 was observed both by Mr. Knab and Mr. Caudell. Their natural prey 

 are apparently the larvae of Culex triseriatus, C. siguifer and C. res- 

 tuans, the first two of which inhabit normally hollow trees, the last 

 has been so found by Mr. Pratt. 



