240 PROCEEDINGS OP THE ACADEMY OP 



Strife very fine and short, body oval 6. obsoletus. 



Surface sparsely and finely punctulate, body elongate oval, 



striae deep 7. nigritulus. 



1. H. punctatus, elongato-ovalis, subcylindricus, piceus, dense minus 

 subtiliter helro-pubesceus, subtilissime punctulatus, elytris praecipue versus 

 latera punctatis et rugosis, striis duabus externis a medio ad apicem profun- 

 dis, antice obliteratis, externa ad humerum paulo impressa ; antennis flavo-tes- 

 taceis. Long. -11. 



Two specimens, one from Louisiana, the other from Georgia. The species of 

 this genus agree so nearly in most of the characters, that it is only desirable 

 to mention the distinctive marks under each species. Tbis oue is narrower 

 than the other coarsely pubescent species, and the elytra are twice as long as 

 their width, and decidedly more punctured, especially at the sides ; the two ex- 

 ternal strife are deep, and extend from the middle to the tip, before the middle 

 they are obliterated, but at the base the outer oue again becomes visible ; there 

 are faint traces of strius near the sides and tip. 



2. H. gravis, ovalis, piceus, dense minus subtiliter helvo-pubescens, sub- 

 tilissime punfUulatus, elytris parce punctatis, striis duabus externis a medio 

 ad apic a m profundis, antice obliteratis, externa ad basin paulo impressa, an- 

 tennis flavo-testaceis. Long. -12 -15. 



Dorcatoma grave Lee, Proc. Acad. Nat. Sc. Phila., 1858, 72. 



Pennsylvania, Dr. Melsheimer ; Texas. " More )egularly oval than the prece- 

 ding, with the elytra only sparsely punctured. There are some faint traces of 

 strife inside of the two outer ones, which are deep from the tip to the middle 

 and then obliterated ; the outer one is visible near the base. 



Two smaller specimens (-10 unc.) collected in Illinois, by Mr. B. D. Walsh, 

 differ by the elytra being more finely punctulate, and more sparsely but dis- 

 tinctly punctured ; I do not regard them as indicating a distinct species. 



3. H. pu sill us, rotundato-ovalis, convexus, rufo-piceus, dense minus sub- 

 tiliter helvo-pubescens, elytris parce punctulatis, striis duabus externis antice 

 obliteratis, antennis flavo-testaceis. Long. -08. 



Dorcatoma piikillum Lee, Proc. Acad. Nat. Sc. Phila., 1858, 72. 



Found at Fort Yuma, (junction of Colorado and Gila), California. The 

 smaller size and more rounded form readily distinguish this species. The 

 surface appears nearly smooth, with scattered very fine punctures on the ely- 

 tra, almost concealed by the pubescence. 



4. H. b o r e a 1 i s, rotundato-ovalis, convexus piceus, subtiliter griseo-pubes- 

 ens, vix conspicue punctulatus, elytris striis externis duabus ad medium antice 

 abbre'viatis, capite rufescente, antennis testsceis. Long. -12. 



One specimen, Lake Superior. The thorax is somewhat more compressed at 

 the sides, so that the outline is straight, and the body becomes more acuminate 

 in front, than in the preceding species. The surface is scarcely visibly punc- 

 tulate, and there are no scattered punctures on the elytra; the strife are finely, 

 but well impressed, and are absolutely abbreviated, not obliterated in front as 

 in the preceding three species, and without any traces of prolongation near 

 the base. 



5. II. ve n t r al i s, elongato-ovalis, niger nitidus, subtiliter griseo-pubes- 

 cens, subtilissime punctulatus, elytris striis duabus externis profundis, ad medi- 

 um antice abbreviatis, capite abdomine pedibusque obscure rufo-piceis, anten- 

 nis flavo-testaceis. Long. -07 -09. 



Illinois, Mr. B. D. Walsh. The elongate oval body, equally rounded at each 

 end, and not at all acuminate in front, will readily distinguish this species. 

 The pubescence is very fine, and there are very fioe scattered punctures on the 

 elytra. 



6. H obsoletus, ovalis, convexus, niger nitidus, subtiliter griseo-pubes- 



[Oct. 



