148 C. ZIMMERMANN, M. D. 



PHLCEOTEIBUS Latr. 

 The antennae are inserted upon the front, before the eyes; the club 

 consists of elongated lamelliform joints, almost like that of a Melolon- 

 tJia, otherwise the body is formed exactly as in JL/lesmns. 



P. froYLta.lia.=Scolytus front. Oliv. 78, 13, Tab. 2, f. 20. [P. setuhsus Eichh. Bei-1. 

 Ent. Zeitschr. 1868, p. 149 ; P. dubiiis Eiclih. ibid. 150.]— Long. |— 1 lin. Brown, 

 antennae and feet ferruginous; of the form of the European P. o/ece, but the 

 joints of the antennal club are much shorter, the elytra deeply grooved, and 

 the intervals are transversely serrate ; the whole body is clothed with short 

 stiff hairs. In the male the front is impressed, and marked each side below 

 the base of the antennse with a small tooth. — Atlantic States. Found in the 

 bark of old stumps of trees, in the swamps of Carolina, in March. [Closely al- 

 lied but different by the finer punctuation of the prothorax is Tomicus limina- 

 ris Harris, (Ins. Inj. Veg. ed Inda. 88,) which occasions according to Miss Mor- 

 ris, the disease in peach trees called yellows. The lamellate joints of the club 

 of the antennae are much longer and thinner than in P. frontalis. — Lce.] 



HYLESINUS Fabr. 

 The elongated pointed antennal club and the short thick oval body 

 easily distinguish this from the following genus. 



H. aculeatus Say, Journ. Ac. Nat. Sc. Phila. Ill, .322.— Long. 1— IJ lin. Of 

 the same form as the European H. fraxini but smaller ; blackish-brown, thickly 

 clothed with very short ashy squamiform hairs ; antennse and feet ferruginous ; 

 a large spot on the middle of the prothorax and the side margins are blackish 

 brown : upon the elytra the 5th interval from the base to the middle is black- 

 ish-brown, the color is then divided into two branches, and prolonged obliquely 

 to the suture; the humeri are ferruginous; the rows of small acute elevations 

 on the intervals of the elytra have suggested the name of this species. — North- 

 ern States. [In well preserved specimens besides the two oblique bands behind 

 the middle there is a third one very near the tip, and the sides of the elytra 

 are also dark colored. — Leo.] 



DENDROCTONUS Erichson. 

 The species of this genus differ from those of Pliloeotrihus and //y- 

 Icsinus by the short obtuse antennal club. They may be divided into 

 three groups: 



A. — Antennal club thick; beak not carinate. 



D. [bifurcus.= CarpAo6orMS hif. Eichh. Berl. Ent. Zeitschr. 1868, p. 147.]— Long. 

 I lin. Black, elytra brown, the whole body covered with fine ashy scales like 

 hairs, without lustre; antennse and feet ferruginous yellow; beak very short, 

 front convex ; prothorax convex, shorter than wide, apical margin rounded, 

 very finely granulately punctured, with a faint smooth dorsal line; elytra cy- 

 lindrical, moderately slender, strongly punctate-striate, the 3rd interval strongly 

 elevated towards the tip. — Carolina. [Also found in Georgia. — Lec] 



B. — Antennal club thick ; beak carinate. (No American species.) 



