OF WASHINGTON. 445 



are three cubital cells, all large, the second not being triangular 

 and receiving the first recurrent nervure far beyond its middle ; 

 the median and submedian cells are equal ; the head is transverse, 

 the temples being flat, the eyes large, occupying most of the sides 

 of the head and leaving no malar space; the pronotum is large, 

 transverse quadrate, with a transverse median grooved line above ; 

 the mesonotum is quadrate with distinct furrows laterally ; the 

 scutellum is subconvex and closely connected posteriorly with a 

 large subconvex post-scutellum ; themetanotum is exareolated ; the 

 abdomen is briefly but distinctly petiolate, the first segment com- 

 panulate at apex and not distinctly separated from the second by 

 a constriction, as in Br achy cist is ; while the legs are as in 

 Brachycistis, except that the claws are cleft, not simple. 



Type Mena nocturna Morawitz. tf. Horae Soc. ent. Ross., 

 XII, 1888, p. 301. Type Cat. No. 5783, U. S. N. M. 



Mr. Howard, referring to his request at the last meeting for 

 observations on the resting position of Anopheles and Culex, 

 stated that he had secured, through Mr. Pratt, living specimens of 

 Anopheles quadrimaculatus, and had verified the resting posi 

 tion mentioned at the last meeting. He had further secured eggs 

 and larvae of this species, and described at some length the differ 

 ences between these stages, both as to structure and habits, from 

 similar stages of Culex. Discussion followed in which Messrs. 

 Marlatt, Ashmead, Gill, and Kotinsky took part. 



The first paper of the evening, by Mr. Sanderson, was entitled 

 "Observations on the Larvae of Donacia."* The speaker made 

 some general remarks on the structural features of Chrysomelid 

 larvae, and described at length the morphological characters of the 

 larvae of Donacia piscatrix. He called special attention to the 

 sensory pits of the basal joint of the antennae, to the very curiously 

 modified maxillae, and especially to the filiform organs on the 

 dorsal surface of the anal end of the body, concluding that these 

 are modified respiratory organs functioning as branchiae. The 

 biology of the species was also described more briefly. The paper 

 was discussed by Messrs. Gill, Ashmead, and Marlatt, all com 

 mending the careful character of the paper. 



Dr. Dyar presented the following paper : 



* Published in Canad. Entomologist, Vol. 23, 1900, pp. 249-263. 



