NATURAL SCIENCES OF PHILADELPHIA. 103 



Colorado Territory. One pair given me by Dr. S. Lewis. The suture of 

 the female is armed with a small spine. Resembles in appearance II. fra- 

 ternus Lee, but besides minor differences it is readily distinguished by the 

 absence of setigerous punctures between the ambulatorial setae of the abdo- 

 domen and the sides. 



26. H. Lewisii. Oblongo-ovalis, niger, antennis palpisque piceo-rufis, 

 illis articulo lmo nigricante ; thorace capite paulo latiore, latitudine plus 

 sesqui breviore postice paulo angustato, lateribus rotundatis, parum depres- 

 sis, basique fere laevibus, angulis posticis subrectis, apice haud rotundatis, 

 elytris subtiliter reticulatis, feminse opacis, striatis, intertitiis planis, 3io 

 puncto postico impresso, abdomine pone et inter coxas parce punctulato. 

 Long. -52 -58. 



Marquette, Lake Superior. Collected and given to me by Dr. S. Lewis, to 

 whom I take pleasure in dedicating this fine species. Also found in Canada. 



The under surface of the abdomen and the legs in the specimens examined 

 is piceous, but in more mature individuals will perhaps be found black. 

 The apex of the suture of the female inH. montanus, Lewisii, rufi- 

 manus, laticeps, viduus and f r a t e r n u s, is armed with a small but 

 distinct spine, of which no trace is seen in H. c a r b o n a t u s. Of H. i n- 

 n o c u u s, I have but one specimen, a male. 



31. H. viduus. Ovalis, niger, antennis palpisque ferrugineis, thorace 

 capite parum latiore, antrorsum subangustato, lateribus haud depressis, 

 angulis posticis apice rotundatis, basi la;vi, foveis parvis ; elytris reticulatis, 

 feminae sericeo-opacis, interstitiis planis, 3io puncto postico impresso; abdo- 

 mine inter et pone coxas parce puuetato. Long. -56. 



One female ; Rock Island, Illinois ; B. D. Walsh, Esq. Differs from H. 

 laticeps by the hind angles of the thorax being rounded at the apex, and 

 by the head being not quite so broad. 



32. H. fraternus. This species is very closely allied to H. funestus 

 and o b 1 it u s, but with specimens of each before me I am able to note the 

 following differences : 



H. fr at ern u s, thorax near the basal foveae feebly and sparsely punctu- 

 late, scarcely perceptibly narrowed behind ; elytra more than 2 J times longer 

 than the thorax, nearly equally shining in both sexes ; sutural spine of female 

 distinct. (5 specimens, Oregon.) 



H. oblitus, thorax distinctly narrowed behind, basal foveas scarcely 

 punctulate; elytra less than 2 J times longer than the thorax; elytra more 

 opake in the female than in the male ; sutural spine of female distinct. Body 

 broader and more oblong than in H. fraternus. (5 specimens, Kansas 

 and New Mexico.) 



H. f un e s t u s, of the same form as H. fr ate r n u s, but smaller, with 

 the sides of the thorax more distinctly depressed, and the suture of the fe- 

 male not armed with a spine at the tip. (5 specimens, Kansas and Ne- 

 braska.) 



35. H. furtivus. Oblongo-ovalis, nigro-piecus, nitidus, subtus piceus, 

 antennis palpis pedibusque piceo-ferrugineis ; thorace latitudine fere duplo 

 breviore, lateribus rotundatis, haud deplanatis, angulis posticis obtusis sub- 

 rotundatis, basi rugoso, haud punctato, foveis parvis, linearibus ; elytris 

 (maris) thorace haud latioribus, vix reticulatis, interstitiis planis, puncto 

 postico dorsali impressis ; abdomen setis accessoribus distinctis, ad basin 

 pone coxas punctulatum, inter coxas^laeve ; mentum dente minuto armatum. 

 Long. -40. 



Colorado Territory. One male kindly given me by Dr. S. Lewis. Seems 

 most nearly related to H. stupidus in characters, although differing in 



1865.] 



