8 PROC. ENT. SOC. WASH., VOL. 22, NO. I, JAN., 1 920 



Thoracic segments about equal in length, meta thorax widest; no distinct 

 areas, except band-like presternal fold, which in the prothorax bears two 

 small chitinous spots; coxal protuberance lateral, strongly projecting. Legs 

 short, conical, weak, widely separated, consisting of five joints; tarsus claw- 

 like-, appendiculate at base. 



Abdomen swollen, and not distinctly marked into areas; ninth bearing 

 two chitinous recurved hooks or cerci; tenth wart-like, terminal. Spiracles 

 annuliform, peritreme circular, rather strongly chitinized, thoracic spiracle 

 on presternal ring of meso thorax ; eight abdominal spiracles. 



Pupa. Form of adult; head concealed beneath prothorax, latter rec- 

 tangular, sides rounded; abdominal terga bearing a few stiff hairs as figure; 

 no cerci. 



Described from specimen, Hopk. U. S. No. 10651v. 



This specimen was taken by the writer at Giant Forest, Cal- 

 ifornia, June 29, 1918, in the pupal cells of Asemum atrum in a 

 dead Jeffrey pine. It could not be determined when the larvae 

 attack the host but the Asemum larvae had constructed their 

 pupal cells and were full grown before being killed. 



Lithophanus succineus Pasc. 



This species has cerci similar to Deretaphrus and the mandible 

 is provided with a retinaculum, which is very slender and pro- 

 jects posteriorly. The last joint of the antennae is rounded at 

 the apex and the supplementary joint is conical. It measures 

 about 8 mm. in length. 



Larvae of this species have not been definitely associated with 

 the adults. A large series of adults were reared from a small 

 piece of Acacia, girdled by Oncideres (Hopk. U. S. No. 15128) 

 which Mr. T. E. Snyder sent the writer from Brownsville, Texas. 

 In the U. S. N. Museum Collection a single specimen, described 

 above, was found, collected by Mr. H. S. Barber, in Parkinsonia, 

 at the same place. Since it differs both from Deretaphrus and 

 Bothrideres it is tentatively associated with this name. 



The reared specimens were predaceous on several species of 

 Cerambycids, Achryson concolor Lee., Ibid/ion townsendi Linell 

 and Obrium maculatum (Phyton pallidum). The cocoons were 

 found under the bark in the larval mines of these hosts. 



Bothrideres geminatus Say. 



Larva. Similar in form and general structure to Deretaphrus oregoncnsix 

 from which it differs in lacking the cerci and the retinaculum of the mandil K ; 

 the lacinia is more lanceolate at the apex. Specimens at hand do not exceed 

 5 mm. in length. 



