PROC. ENT. SOC. WASH., VOL. 22, XO. I, JAN., 1920 '.> 



Described from Hopk. U. S. Nos. _>N43e, 3838, l()()-S:?j, 1- ; <i<><), 

 and Hopk. W. Va. Nos. (J977e and 7177. The specimens were 

 collected by Dr. A. D. Hopkins, Mr. W. S. Fiske, J. NT. Knull 

 and the writer. They were all predaceous on Coleopterous larvae 

 or pupae, in each case killing the host after it had completed its 

 larval mine. The hosts were Saperda Candida in apple; Saperda 

 discoidea in hickory and a Chariessa pupa in persimmon. 



Specimens 12600 were taken under the bark of Qjtercns sp. 

 sent to Washington by M. Chrisman from Sabino Canyon, 

 Arizona. Several larvae were found inside a single pupa of 

 Chrysobothris. They were isolated March 20, 1914, and soon 

 formed cocoons on the sides of glass vial containers. Adults 

 emerged August 15. In this case the writer believes they were 

 internally parasitic. 



Bothrideres cactophagi Schwarz. 



No larvae of this species have been seen but Mr. H. G. Hub- 

 bard recorded some interesting notes on the habits. He found 1 

 it in large numbers in the cocoons of the cactus weevil (Cacto- 

 phagus validus) on which it is undoubtedly parasitic. Mr. E. A. 

 Schwartz tells me it does not make a cocoon as B. geminatii*. 



Cocoons of Bothrideridae. 



Three species here described all pupate in cocoons. These are 

 made by the full-grown larvae. They are probably of a chit- 

 inous material but whether secreted from the buccal opening or 

 from anal glands as do the species of Donac-ia 2 has not been deter- 

 mined at present. The cocoons of Bothrideres and Lithophanns 

 have a silky appearance and webby texture as though compos! 

 of minute threads, while that of Deretaphrus is of considerably 

 heavier material and uniform texture. On this last cocoon the 

 concentric arrangement of the exterior shows how it is built. 

 They are all attached to the wood on the side of the larval mine 

 of the host. 



The cocoon of Dcrctaphnis measures 14 mm. in length by 4 

 mm. in width. Litliopliauns is 6 mm. long by 3 mm. wide. 

 Bothrideres is 15 mm. long by 3 ! /2 wide. That of Deretaphrus 

 and Lithophanus are elongate oval, while Bothrideres is broadly 

 oval and quite depressed. 



1 Supplement to Psyche; Insects of the Giant Cactus. May, IS'.i'.i. 

 8 and 10. 



- B0ving, Adam G. Biclrag til kundskaben om donaciin-larverm^ nutnr- 

 historie. K0benhavn, H. Hagerups forlag 1906. 



