374 PROCEEDINGS OF THE ACADEMY OF 



kindly given to me by Mr. B. Billings, which does not differ from the descrip- 

 tions and figure of this species. I have had no opportuniry of comparing it 

 with European specimens. 



TACHYPORUS Grav. 



T. maculicollis, piceus, modice elongatus, antennis, palpis, pedibus, 

 elytris thoraceqne testaceis, hoc macula dorsali picea notato, elytris abdomi- 

 neque subtiliter punctulatis et pubescentibus, hoc nigfo-pilosello, segmentis 

 dorsalibus ventralibusque postice testaceo-marginatis. Long- 3-25 mm. 



Two specimens, Quebec, Canada ; Mr. W. Couper. This species is less 

 elongate than T. j o c o su s, the abdomen being scarcely longer than the elytra, 

 which are about one-fourth longer than the thorax. The color, as above de- 

 scribed, will enable this species to be readily recognized. In the male the pe- 

 nultimate ventral segment is acutely emarginate, and the last segment pro- 

 longed ; in the female the last dorsal is acutely four-toothed. 



T. maculipennia, piceus, minus elongatus, antennis, palpis, pedibus, 

 thoraceqne testaceis ; elytris subtiliter punctulatis et pubescentibus, vitta sub- 

 marginali, gutta dorsali pone basin, apiceque testaceis ; abdomine nigro- 

 pilosello, subtiliter punctulato, segmentis postice testaceo-marginatis. Long. 

 2-75 mm. 



One female specimen from Louisiana was given me by my lamented friend, 

 Dr. Schaum. This species is more robust than the preceding, and the abdo- 

 men is a little shorter than the thorax. The last dorsal segment is retracted, 

 and acutely four-toothed. 



A female from Illinois, given me by Mr. Ulke, is 4 mm. long, with the abdo- 

 men conspicuously longer than the elytra ; the black markings of the latter are 

 reduced in size, so that the ground color is pale, with a common scutellar spot, 

 a large discoidal blotch, and a marginal elongate spot remain blackish. I 

 believe it to belong to the same species as the type above described. The last 

 dorsal segment is acutely four-toothed. 



CONOSOMA Kraatz. 



C. Knoxii, elongatum convexum, subtiliter sericeo-pubescens, capite 

 nigro, thorace elytrisqne testaceis, illo ante medium, his postice et extrorsum 

 nigris, abdomine nigro, basi testaceo ; pedibus antennisque flavo-testaceis, his 

 articulis 4 9 piceis, externis crassitie longioribus. Long. 3-5 mm. 



One specimen, Lycoming County, Pennsylvania. I have dedicated this beau- 

 tiful species to my friend Joseph Knox, of Pittsburgh, whose genial manners, 

 and well rewarded exertions in capturing specimens of trout added greatly to 

 the enjoyment of the excursion in which I discovered this and other interesting 

 additions to the fauna of Pennsylvania. 



The species of Conosoma (Oonurus Er.) in my collection agree very nearly 

 in form and sculpture, and are to be distinguished by size and color rather than 

 by structural differences. Several are still undescribed, but the present species 

 may be easily recognized by the characters above given. 



STICTOCRANIUS Lee. (n. g. Staphylinida?). 



S. puncticeps, elongatus piceus nitidus, capite grosse punctato, fronte 

 transversim emprcsso, margine antico elevato; thorace obovali, capite paulo 

 angustiore, latitudine longiore, convexo lsevi, punctis utrinque 7 magnis cana- 

 liculaque brevi media insculpto; elytris hevibus punctis magnis 3 vel 4 versus 

 suturam alterisque paucis dorsalibus insculptis; abdomine immarginato parce 

 punctulato ; antennis pedibusque piceo-ferrugineis. Long. 2-30 mm. 



Two specimens of this remarkable insect were found by Mr. Ulke, near Wash- 

 ington, D. C; one of them he has liberally placed in my collection. This new 

 genus is related to Euaesthetus and E d a p h u s, having the tarsi 4-jointed, 

 as in those genera ; but it differs from both by the peculiar sculpture above men- 



[Dec. 



