Aug.. 1845.] 267 



Tachxwus, Gravenh. 



T. puncticollis. Chestnut-brown ; thorax with two punctiform impressions 

 on the middle near the basal margin; elytra yellowish-testaceous. Length 4 

 lines ; breadth If lines. 



Head dark chestnut-brown. Antenncc, four basal joints rufo-testaceous ; re- 

 maining joints fuscous, excepting the terminal one which is dull-yellowish at 

 tip. Clypeus and palpi rufo-testaceous. Labrurn pale yellowish. Thorax, at 

 base slightly narrower than the base of the elytra, transverse, base subrectilinear, 

 sides rounded and marginate, angles obtusely rounded, anterior ones deflexed; 

 two punctiform impressions on the middle near the basal margin, between 

 which is an abbreviated longitudinal impressed line; dark chestnut-brown; 

 highly polished. Scutellum rather small, impunctured, somewhat duskv. 

 Elytra punctured ; yellowish-testaceous, with the lateral edges and suture pos- 

 teriorly, and the apical margin dusky. Pectus and feet, dull yellowish-rufous. 

 Abdomen punctured, dark chestnut-brown. Inhabits Pennsylvania. 



Somewhat like T. crassus, Gravenh., but differs in the punctiform impressions 

 of the thorax, in being much wider in proportion to its length, and in its deptk 

 of colouring; in the present species the body is chestnut-brown, whereas in 

 crassus it strongly inclines to black. Can it be a variety of that species ! 



Phcexops, Megerle. 



P. luteosignata. Blackish ; elytra each with three yellowish or ferruginous 

 spots. Length 5^ lines; breadth 2^ lines. 



Phoenops luteosignata, Dej. Catal. 



Head coarsely punctured ; a shallow, longitudinal indentation on the front. 

 Antenna bluish-black. Thorax numerously punctured each side, punctures 

 very much dilated, and sometimes confluent ; on the disk, the punctures are less 

 obvious, presenting rather a corrugated appearance ; a broad, shallow indentation 

 each side behind the middle, converging posteriorly near the basal margin, and 

 a large profound punctiform impression before the scutel. Elytra black, with a 

 bluish tinge, granulated ; a dull yellowish or ferruginous spot arising near the 

 base and running backward to before the middle, then curving regularly inward, 

 and nearly attaining the suture; a small triangular spot on the middle near 

 the lateral margin, and another near the tip. Beneath dark cupreous, polished. 

 In the cabinet of Prof. Haldeman. Inhabits Georgia. 



Agrilus, Megerle. 



A. quadriimpressus. Blackish-cupreous, surface minutely chagrined ; a 

 shallow impression each side of the front near the central margin of the eyes 

 Length 3| — 4| lines. 



Agrilus acutipennis, Dej. Catal. 



Body blackish-cupreous, with a bluish tinge, darker beneath. Head with a 

 longitudinal impressed line on the front posteriorly. Eyes dull yellowish. 

 Thorax transversely rugose, slightly tinged with green; a large shallow in- 

 dentation before the scutel, and another near the anterior margin, on each side 

 of which is a slight circular impression; lateral indentations profoundly im- 

 pressed. Scutel blackish-green. Elytra violaceous, finely granulated. In the 

 cabinet of Prof. Haldeman. Inhabits Georgia. 



