OF WASHINGTON, VOLUME XIII, 1911. 57 



Conotrachelus posticatus Boheman. 



July 14, 1905. 

 Conotrachelus similis Boheman. 



Breeds in the fruit of Bumelia lanuginosa, August 6, 1907 

 (Mitchell). Bred one male braconid from this lot. 



Rhyssematus palmacollis Say. 



Three specimens on sweet potato (I pomcea batatas] on Mitchell 

 farm, May 27, 1903; larvae in seed of I pomcea sinuata, July 12, 

 1907, entered ground July 21, adults August 13 (Mitchell). 



Chalcodermus collaris Horn. 



On cotton, May 9, 1904 (Walker); on Cassia chamcechrista 

 flowers, banks Dry Creek, July 8, 1905, October 25, 1907 

 (Mitchell). 



Chalcodermus vittatus Champion. 



Breeding in the seed of balloon vine (Cardiospermum halica- 

 cabum), September 17, 1907 (Mitchell); larvae October 8, 1907, 

 adults December 2 (Mitchell and Cushman). 



Gerstaeckeria nobilis Le Conte (Acalles). 



On Opuntia, April 17, 1908; breeds in flat cells in the joints 

 of broad-leafed species of Opuntia (Mitchell). 



Tyloderma baridium Le Conte. 



April 10, June 1, 1907 (Mitchell). 

 Tyloderma foveolatum Say. 



On flowers, Voit's pasture, May 28, 1905 (Mitchell). 

 Tyloderma subpubescens Casey. 



November 19, (Pratt); bred from Polygonum punctatum, Sep- 

 tember 24, 1910 (Mitchell). 



Cryptorhynchus fal!ax Le Conte. 



Breeding in dry stems and stumps of Cassia occnlcntalis, in 

 all stages, March 17, 1909 (Mitchell). 



Cryptorhynchus obtentus Herbst. 



Not rare in winter time under loose bark of felled trees 

 (Schwarz). 



Acamptus rigidus Le Conte. 



In red-rotten wood of Populus, March 15 (Schwarz). 



