Vol. 31, pp. 107-108 November 29, 1918 



PROCEEDINGS 



OF THK 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW HYDNOCERA (COLEOPTERA : CLERIDAE). 

 BY EDWARD A. CHAPIN. 



The material upon which the following diagnosis is based 

 was received through Mr. A. B. Wolcott from Mr. F. E. Blais- 

 dell, Sr. Having had the opportunity of comparing these 

 specimens with authentic specimens of the allied species and 

 finding the differences to be constant, I offer the following 

 description : 



Hydnocera binotata, nov. sp. 



Moderately elongate ; aeneous, elytra each with a pale spot slightly post 

 median : antennae except club, and main part of legs testaceous ; antennal 

 club and mouth parts piceous. Head (with the prominent eyes) as wide 

 as the elytra at the humeri, very finely and densely punctured, densely 

 pubescent with short, depressed, silvery pubescence. Thorax slightly 

 broader than long (37-42), sides prominently dilated slightly before the 

 middle, sides behind dilations nearly parallel, apical transverse impres- 

 sion distinct, not deep, slightly V shaped, basal transverse impression 

 straight, rather deep, very close to basal margin of thorax. Lateral 

 foveae shallow, not sharply delineated. Surface very densely punctured, 

 the punctures more coarse than those of head but finer than those of the 

 elytra. Pubescence very dense, depressed and silvery, with a few pale 

 erect hairs intermingled. Scutellum densely pubescent. Elytra slightly 

 shorter than abdomen, dehiscent from apical third, sides distinctly con- 

 vergent towards apices, which are evenly rounded, strongly serrate and 

 somewhat tumid. Surface coarsely and very densely punctured, the 

 punctures on the apical two-fifths (behind pale maculation) confluent. 

 Pubesence moderately dense, depressed. Color metallic black with red- 

 dish luster, each with a transversely oval pale spot at apical two-fifths. 

 Under parts greenish black, densely pubescent except for posterior coxae 

 which are striate and nearly glabrous. Legs, excepting coxae, rufo-testa- 

 ceous, knees of middle and hind legs darker. Length: 3-4 mm. 



30— Proc . Biol . Soc . Wash .. Vol. 31 , 1918 . ( 107 ) 



