AMERICAN COLEOPTERA. 163 



smooth, shining, rather strongly constricted at the neck, punctured as in 

 fulgidus. Labrum bilobed. Antennae attaining the middle of the thorax, 

 gradually thicker externally, last joint longer and slightly obliquely truncate. 

 Eyes longitudinally oval, subtruncate in front. Thorax slightly broader than 

 long, smooth, shining, very little narrowed in front, sides feebly, base a little 

 more arcuate; dorsal series of three punctures, no lateral series, marginal punc- 

 tures small and distant. Scutellum smooth. Elytra as wide as thorax, coia- 

 jointly a little longer than wide, surface impunctured, slightly wrinkled and 

 feebly shining, glabrous. Abdomen sparsely punctate and pubescent, beneath 

 and above. Posterior tibiae not spinulose externally, the femur with a row of 

 short bristly hairs beneath. Length .20 — .36 inch; 5 — 9 mm. 



The male has a feeble emarj^ination at the tip of the sixth ventral. 

 The anterior tarsi are dilated in both sexes but rather less in the 

 female. 



The color of this species is usually piceous, the elytra and margins 

 of the abdominal segments rufo-testaceous. It may however be en- 

 tirely piceous black, or the pale elytra may have a broad median 

 piceous stripe. 



The post coxal process is moderately long and translucent. 



I have seen types of plagiatus and longipennis, and the description 

 of rujipennis does not differ from some of the well known varieties 

 before me. 



Occurs in northern Europe, and on our own continent from Alaska 

 to Oregon, Kansas, Canada and Pennsylvania. 



Q. niolochinns Grav. [Staph.) Mon. p. 46; Erichs. Staphyl. p. 555.— Head 

 oval, smooth, shining, feebly constricted behind, with a small puncture at the 

 base of the antennae, another at the inner margin of the eye, three above the 

 eye posteriorly and one immediately behind, front with or without punctures. 

 Eyes moderately large, not prominent, oval, slightly oblique, subtruncate 

 in front. Labrum moderately prominent anterior margin broadly arcuate. 

 Antennae nearly attaining the base of the thorax, raiher slender, second joint 

 very little shorter than the third, last joint obliquely truncate. Thorax a little 

 wider than long, narrowed in front, sides feebly base broadly arcuate, surface 

 smooth shining, with a discal series of three punctures, two others placed 

 transversely and with marginal punctures around the base alone. Scutellum 

 punctured. Elytra slightly narrower than the thorax, conjointly a little wider 

 than long, densely punctured and clothed with brownish hair. Abdomen 

 moderately densely pubescent and clothed with similar pubescence, beneath 

 somewhat less densely punctured than above. Legs sparsely punctate, tibiae 

 spinulose externally. Length .28— .50 inch; 7 — 12.5 mm. 



The sixth ventral of the male is deeply triangularly emarginate, 

 the anterior tarsi broadly dilated and in the female less dilated. 



The color is usually entirely piceous, the elytra and legs are how- 

 ever often brownish, or piceous with the entire limb rufous. 



The post coxal process is rather short and translucent. 



