110 GEO. H. HORN, M. D. 



anterior male tarsus than is usual among coleoptera, so that joints o. I 

 and 5 are frequently at right angles to the two preceding joints, while 

 the prolongation of the second joint seems thus to be directed ob- 

 liquely inwards. In every instance, however, the process is found to 

 be canaliculate beneath for the reception of tbe third joint, and speci- 

 mens of the same species are before me, some with the tarsal joints 

 all in line, others with the last three oblique to the others. In the 

 accompanying diagrams the upper two 

 cuts represent the anterior male tarsus of 

 Attalus as seen directly from above and 

 also from the side and slightly beneath. 

 This is the form seen in our fauna. The 

 lower two cuts show the tarsus of Ebseus 

 with the oblique prolongation of the second 

 ^xp^j v jr^"' joint. Avletus does not essentially differ from 

 ^^^ ~~*^— : ^' Attalus. The process of the second joint is, 

 Wy f however, shorter and the antennae more dis- 



tinctly serrate in the male than in the other 

 species of Attalus, but these seem scarcely to 

 warrant generic separation. As Duval observed 

 very little reliance can be placed on characters drawn from the extent 

 of the coriaceous margin of the front, or from similar structure in the 

 ventral segments. 



Mkrolipus differs from Charopus in having the anterior tarsal 

 joints of male nearly of equal size, and stouter than is usual in the 

 group. 



Of the genera above cited Endeodes, Tanaops and Microllpus are 

 peculiar to the Pacific region, the first being found oniy along the sea- 

 coast. Malachius contains one introduced species, four from the 

 Pacific and one from Dacota. Anthocomus and Pseudebseus are 

 peculiar to the Atlantic region. Trophimus and Temnopsophus have 

 each but one species, while Attalus is found in every portion of our 

 fauna, many of its Pacific forms assuming the elongate head of Tanaops. 



TROPHIMUS, Horn. 



Trophimus, Horn, Trans. Ent. Soc. 1870, p. 84. 



T. SCiieipennis, Horn, loc. cit., p. 85. — Head elongated black, shining. 

 Thorax reddish yellow with small black spot near middle of anterior margin. 

 Elytra black with aeneous tinge. Legs black. Length .12 — .14 inch; 3 — 3.5 

 mm. 



Collected in Colorado. 



