TKTKOPIUM. 95 



Genus TETROPIUM. 



Tetropium, Kirby, Fauna Boreali- Americana, pt. iv, Ins. p. 174 

 (1837) ; Lacord. Gen. Coleopt. viii, p. 208 (1869). 



Criomorphus, Mulsant, Coleopt. de France, Longicornes, p. 58 

 (1839). 



Isarthron, Redtenb. Fauna Austriaca, p. 485 (1849). 



Type, T. ccistaneum, Linn., a European species. 



Range. Europe ; Central and North Asia ; North America, 

 Mexico and Guatemala. 



Head with the front short, sub vertical ; the postclypeus 

 triangular, the anteclypeus short, transverse and membranous ; 

 mandibles short ; maxillary palpi a little longer than the labial, 

 last joint triangular; gula without meutigerous process; eyes 

 rather finely facetted and divided each into two parts which are 

 more or less distant from one another and united only by a smooth 

 raised line destitute of facets. Antennae inserted before the eyes 

 not far from the base of the mandibles ; much shorter than the 

 body, attenuated towards the end ; first joint short and thick ; 

 the second half as long as the third ; third to fifth subequal in 

 length, sixth to tenth gradually diminishing ; eleventh shortly 

 appendiculate, longer than tenth. Prothorax transverse, some- 

 what flattened above, rounded at the sides, broadest a little before 

 the middle and narrowed most towards the base. Elytra feebly 

 convex, not very long, more or less parallel-sided, broadly rounded 

 at the apex. Legs rather short ; femora compressed, fusiform, 

 sometimes very shortly pedunculate at the base ; first joint of hind 

 tarsus as long as the second and third united. Acetabula of front 

 coxae strongly angulated on the outer side, the intercoxal process 

 very narrow and for the most of its length forms a thin vertical 

 plate ; the intercoxal process of the mesosternum also very narrow, 

 but widened out in front. 



88. Tetropium oreinum, sp. n. 



Black or brownish black, the upperside for the most part dull, 

 the underside and legs somewhat glossy. Head sparsely clothed 

 with tawny setae ; densely rugulose-punc- 

 tate, marked along the vertex and front 

 with a median groove. Prothorax sparsely 

 setose ; widest a little before the middle, 

 narrowed more towards the base than in 

 front, marked with a transverse groove a 

 little in front of the basal margin, the 

 latter not raised ; surface finely and very 

 densely granulated, except on two or 

 three small areas in front which are 

 Fis.37.-Tetropium punctate and slightly nitid, and on a 

 oreinum, Gahan. xi- small, smooth, median callosity near the 

 base ; disc with a slight depression along 

 the middle. Elytra densely punctulate and somewhat glossy near 



