PROC. EXT. SOC. WASH., VOL. 21, XO. 6, JUNE, 1919 1 2o 



Dendrocerus conwentziae variety rufus, new variety. 



Female. -Length 2 mm. Color rufo-testaceous suffused with dark brown 

 or blackish above on the head, thorax, and abdomen; the scutellum and 

 axillae somewhat darker than the rest of the thorax; antennae black or brown- 

 black, the base of scape paler; legs concolorous with the underside of the body, 

 the hind legs more or less infuscated; wings distinctly infuscated with brown- 

 ish, the base and apex hyaline; venation brownish black. Vertex behind with 

 a delicate median longitudinal line running from the postocellar line to the 

 occipital carina; median groove on the mesoscutum distinct. Otherwise like 

 the female of conwentziae. 



Male. -Apparently agrees in every particular with males of the variety 

 conwentziae. 



Type locality. Felida, Clark County, Washington. 



Type. Cat. No. 22278, U. S. N. M. 



Three females and three males reared by E. J. Newcomer 

 from cocoons of Conwentzia sp. under Quaintance No. 14081, in 

 May, 1918. Also a male and female from the same source reared 

 June 3, 1918, and mounted on a slide. 



NOTES ON A COCOON MAKING COLYDIID (COLEOPT.). 

 BY H. E. BURKE, U. S. Bureau of Entomology. 



In the Proceedings of the Entomological Society of Washing- 

 ton for January, 1905, Dr. A. D. Hopkins published a note on 

 a cocoon spinning Colydiid, probably Bothrideres contract us 

 which he found to be a parasite of a Cerambycid larva. 



On July 22, 1914, at the Pyramid Ranger Station, Eldorado 

 County, Calif, the writer collected a number of dark brown 

 cocoons from the wood of an old fire scar on the side of a living 

 incense cedar (Libocedrus dec^^rrens). The cocoons were taken 

 from the pupal cells of the flatheaded woodborer, Trachykele 

 opulenta Fall. Most of the cocoon makers had emerged but one 

 larva could be seen through the walls of a cocoon which was taken 

 from a cell containing a dead Trachykele beetle. Later a beetle 

 emerged from another cocoon and was identified as Deretaplinis 

 oregonensis Horn by Mr. W. S. Fisher. 



An adult of the same species was taken on August 2, 1915, 

 from the bark of a dead Jeffrey pine (Finns jeffreyi) which con- 

 tained a brood of the Jeffrey pine beetle (Dendroctonus jejjreyi 

 Hopk.). Several adults were taken at Onion Valley, Calif., on 

 October 13, from the bark of a dead sugar pine (P. lambertiand) 

 which contained a brood of the mountain pine beetle (D. monti- 

 colae Hopk.) and broods of the flatheaded woodborers (Buprestis 

 laeviventris I,ec. and B. aurulenta Linn.). Other specimens 

 were taken at Yreka and Vade, Calif. 



