GEORGE M. GREENE 257 



"The characters of the genus Centrintjs, as laid down by M. Schoenherr, do 

 not all apply to these insects, which have not 'the rostrum as long as the body,' 

 nor 'the eyes distant,' nor 'the thorax almost double the wadth of its length'; 

 and 'the club of the antennae' is not very distinctly 'acuminated.' The 

 antennae of the sutor approach nearest to the description of those of Ckntrixus, 

 but in the dilediis, the third joint is longer than it is represented to be in this 

 genus. Notwithstanding these discrepancies there is no other in which they 

 can be so properly arranged. 



" From Baridius, they differ in the form of the body, which is not rhomboidal, 

 nor rounded behind, nor with the anal segment exposed; and the antennal 

 joints are more elongated, and not so closely connected. They remind one 

 (particularly the dilectus,) of the genus Balaninus, in general form, color, 

 and length of the rostrum; but cannot be referred to it on account of the struc- 

 ture of the breast, differences in the antenna>, and other essential characters." 



Page 82. " 19. Tomicus ? pusillus. 



"Dark chestnut; head with erect hairs; thorax tuberculated Ijefore; posterior 

 declivity of the elytra scabrous and hairy; antennic and feet honey-yellow. 



"Length 6 hundredths of an inch. 



"Halseys Collection, No. 260. 



"Dark chestnut-brown. Head covered with long, erect [page 83] hairs. 

 Thorax with short hairs, intermixed with elevated, thick points, which are 

 larger in front and sloping backwards, smaller behind, and disappearing 

 before the middle, behind which the thorax is minutely pimctured and sub- 

 glabrous. Elytra subglabrous, minutely punctured, rough on the posterior 

 declivity, which is covered with short hairs or bristles arranged in longitudinal 

 rows. Antenna' and feet brownish yellow, the clul) of the former paler. 



"This minute insect probably belongs to the genus Tomicus, but, being 

 gummed on card, it could not })e sufficiently examined. The body is cylindrical, 

 o})tuse and obliquely truncated behind. The club of the antenna' oval, com- 

 pressed, three-jointed; the joints transverse, the last one semicircular and 

 largest. The anterior tibia^, the only ones which could be seen, were not very 

 much dilated, and had a number of small teeth on the outer edge.'' (This is 

 9062 [Henshaw'], Pityophthorus minutissimus Zimm.) 



Page 83. "20. Prionus l.evigatus. Plate I, fig. 6. 



"Chestnut-brown, subglabrous; thorax three-toothed; the last two joints of 

 the maxillary i)alpi nearly equal; breast, in both sexes, hairy. 



"Length from 1 inch and 12 hundredths to 1 inch and 52 hundredths of an 

 iDch. 



"p. la-rigatus, Harris. Catalogue, p. — . 



"Halseys Collection, No. 227. A male. 



"Cabinet of the Boston Soc. Nat. Hist. No. 1362. male. No. 1360. female. 



"Body chestnut-brown, smooth. Head confluently punctured, channelled 

 longitudinally between the eyes; last joint of the maxillary palpi thicker but 

 not much longer than the preceding one. Thorax short, transverse, minutely 

 punctured; lateral margin horizontal, somewhat dilated, with a prominent 

 reflected tooth on the anterior angle and middle; the hinder angles shghtlj' 



TRANS. AM. ENT. SOC, XLIV. 



