242 J. L. LECONTE, M. D. 



Lake Superior, and White Mountains, N. H. I observe no sexual 

 differences in the specimens examined. This species is cited in my 

 List of Coleoptera, but I neglected to describe it. 



2. A. biiinpressus, Maklin, Bull. Mosc. 1852, ii, 319. — Depressed, brown, 

 shining, slightly pubescent, head and abdomen darker. Head sparsely punc- 

 tured ; antennae paler at base, outer joints transverse. Prothorax a little wider 

 than long, rounded on the sides, narrowed behind, angles rounded, base rounded, 

 disc sparsely very finely punctured, broadly obliquely impressed each side near 

 the base; dorsal line narrow, smooth, very finely channeled, not elevated. 

 Scutellum small, triangular. Elytra twice as long as the protiiorax, and about 

 one-third wider, rather strongly punctured. Dorsal segments nearly smooth, 

 ventral very finely and sparsely punctuJate. Length 3 mm; .12 inch. 



Alaska; two specimens kindly sent me by Prof. Maklin and Count 

 Mniszech- 



3. A. annectens, n. sp. — Dark-brown, shining, slightly pubescent, legs 

 testaceous. Head rather strongly punctured, nearly smootli in front. Pro- 

 thorax nearly twice as wide as long, much rounded on the sides in front, then 

 obliquely and strongly narrowed to the base which is nearly straight, angles 

 obtuse and rounded; disc coarsely and deeply punctured, dorsal line rather 

 broad, elevated ; an oblique impression each side near the base, and another 

 in front of the middle > between them is a small smooth callus. Scutellum 

 invisible. Elytra twice as long, and a little wider than the prothorax, densely 

 but not finely punctured. Dorsal segments nearly smooth, ventral finely and 

 sparsely punctulate. Length 3 mm; .12 inch. 



San Mateo, Gala.; one specimen. The antennae are somewhat less 

 thickened externally than iu A. biimpressus, and the last joint of the 

 maxillary palpi is rather more slender. The under surtace of the pro- 

 thorax is, however, entirely similar in these three species. 



TR04>iOPIIL<£lTS Mann. 



The species here assembled under this generic name agree in having 

 the irout tibiae not spinose, the second joint of the tarsi with a long 

 spine, or stout seta extending beneath as far as the end of the third 

 or last joint; the claws are large, the scutellum invisible, and the 

 middle coxae are contiguous. 



They differ among themselves in other respects, such as the distance 

 of the eyes from the base of the mandibles, and the consequent presence 

 or absence of a distinct concave space for the reception of the first 

 joint of the antennae. The form of the third joint of the maxillary 

 palpi, and the size of the fourth joint also varies; the latter is always 

 acicular, but sometimes so small as to be indistinct. The form of body 

 differs greatly iu different species, and exhibits a tendency to imitate 



