AMERICAN COLEOPTERA. 169 



Haldeman obtained Di/sphaga, uear Columbia, Pennsylvania. I have 

 also a specimen from Louisiana. 



The head of the female is not concave, but has a well marked, small 

 transverse impression on the front. 



POLYGRAPHUS Er. 



P. rufipennis.^^^a^e (Lepisomus) riifipennis Kirby, Fauna Bor. Am. iv, 193, 

 tab. 8, fig. 2; A. (L.) nigriceps, Kirby, ib. 194; P. saginatus Mannh. Bull. Mosc. 

 1853, 237. 



Alaska, Canada, Maine, Louisiana, The elytra are marked with 

 inconspicuous rows of punctures; the intervals are flat, with fine, 

 mostly transverse rugosities, and tolerably densely punctulate ; the 

 pubescence is short, coarse, depressed, and of a yellowish-gray color. 

 Long. 2 — 2-5 mm. The eyes are divided as in JQ/loterus. The front 

 is slightly impressed in the male, and has a small medial tubercle, 

 sometimes divided into two. 



HYLESINUS Fabr. 

 The species of this genus may be grouped as follows : 



A. Funiculus of antennae as long as the club, with seven distinct joints: 

 Body densely covered with ^iale and dark scales ; 



Oval, club of antennse fusiform : 



Thorax muricate at the sides before the middle, 1. imperialis. 



Thorax not muricate 2. aculeatus. 



Elongate, club of antennse ovate : 



Thorax feebly constricted in front 3. sericeus. 



Thorax strongly constricted in front 4. nebulosus. 



Short and stout, club of antennse nearly oval 5. fasciatus. 



Body sparsely clothed with short yellow hairs; club of antennse 

 oval 6. opaculus. 



B. Funiculus of antennse shorter than the club, 6-jointed, joints 

 2 — 6 closely united into a conical mass ; 



Elytra with deep strise, intervals rough, the alternate ones 

 acutely tuberculate near the tip, (pubescence short:) 



2 mm.— 1st and 3d intervals only slightly elevated 7. dentatus. 



3"5 mm. — 1st and 3d intervals strongly elevated and tu- 

 berculate behind S. serratus. 



4 mm.— 1st interval feebly elevated, 3d strongly so behind. .9. cristatus. 

 Elytra with rows of large punctures, intervals punctured, 

 3d retuse near the tip and acutely toothed, (pubescence 

 long) 10. hystrix. 



A. 



In all these species the funiculus of the antennse is 7-jointed, with 

 the joints 2 — 7 nearly equal ; the club is uniformly finely pubescent, 

 except in H. fasciafus, where the basal portion is more shining. 



1. H. imperialis Eichh. Berl. Ent. Zeitschr. 1868, 149, 



Dacota and Arizona. Of the same form and color as H. aculeatus, 



