124 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Female. — Differs from the male in being usually more robust, 

 front of head broader, slightly more depressed on vertex, more 

 sparsely punctured ; antennae extending only to middle of pronotum ; 

 scutellum feebly earinate ; presternum more sparsely punctured ; first 

 abdominal segment feebly flattened, and more sparsely punctured 

 and shining: second abdominal segment not grooved at middle, and 

 the last abdominal segment broadly rounded at apex. (Tibiae and 

 tarsi missing.) 



Kedescribed from the male type in the collection of C. A. Frost. 



Type locality. — Aweme, Manitoba. 



DISTRIBUTION 



Material examined : 



Manitoba: Aweme, June 25 (N. Criddle). 

 Michigan : No definite locality. 



Ontario: Toronto ( ). 



Quebec : Rigaud. (- ). 



Variations. — In some examples the head is a little more deeply 

 depressed and more greenish than in others, the depression on the 

 pronotum is somewhat variable in depth, and the scutellum is vaguely 

 earinate. In one example there are indications of a longitudinal 

 costa on each elytron, due to the sutural region being vaguely de- 

 pressed, and the anterior margin of the prosternal lobe is broadly 

 rounded without any emargination at the middle. Length 6.5 to 9 

 millimeters. 



Host. — Unknown. 



This species may be confused in collections with arfxius, but in 

 criddlei the pronotum is without distinct prehumeral carinae (some- 

 times with an obtuse sw-elling near the posterior angles), the males 

 have the claws cleft alike on all the feet, and the lateral lobes of the 

 genitalia are only feebly expanded near the tips, with the median 

 lobe acute at the apex. 



38. AGRILUS OLIVACEONIGER, new species 



Agrilus acutipennis Horn, Trans. Amer. Ent. Soc, vol. 18, 1891, p. 308 

 (part). — Chittenden, U. S. Dept. Agric, Div. Ent., Bull. 22, new ser., 

 1900, p. 67 (part).— Frost, Canad. Ent.. vol. 44, 1912, p. 252.— Chamber- 

 lin, Cat. Buprestidae, 1926, pp. 47-48 (part). 



Male. — Form similar to qtLadriimpressus Ziegler, feebly shining, 

 and slightly flattened above; olivaceous to brownish black, with a 

 slight aeneous tinge, and the head and pronotum more or less 

 cupreous ; beneath more cupreous and shining than above. 



Head with the front wide, feebly convex, slightly narrower at bot- 

 tom than at top, longitudinally impressed on the occiput and vertex, 

 lateral margins obliquely expanded from base to middle, where they 



