AMERICAN COLEOPTERA. 307 



be no difficulty in separating it from the preceding two species. In 

 nearly all the specimens I have seea the sides of the thorax are rufo- 

 piceous, and a vague paler space on each elytron extending from the 

 humeri to the suture at apex. 



Occurs in the White Mountains, (Austin), and the Lake Superior 

 region. 



Here seems a fit place to reproduce Say's description of an un- 

 known' species. It is certainly not an Agathidium, and may be 

 either an Anisotoma or Hydnobius. I have placed it doubtfully 

 under H. Matthewsii. 



" Agathidium pallidum. — Body yellowish-testaceous ; elytra with 

 very minute transverse lines. 



" Inhabits Missouri. 



"Body oval, convex, yellowish-testaceous, glabrous; head with a 

 few hairs beneath the edge; eyes prominent, hemispherical, black; 

 palpi subulate; antennae hirsute, clavate ; club oblong, perfoliate; 

 second joint of club minute; thorax impunctured; scutel minute; 

 elytra rugose in transverse very minute lines; thighs with very 

 minute spines above; tibia with prominent rigid spines. 



" Length more than three-twentieths of an inch. 



" A simple specimen occurred under wood, at Engineer Canton- 

 ment." 



Although the Anisotomini with similarly sculptured elytra are few 

 I am entirely unable to make this fit any known to me, the nearest 

 approach being as above stated. 



AGL,YPTUS Lee. 

 Head broad and flat, with distinct antennal grooves beneath, clypeus not 

 prolonged, finely margined in front, the suture not visible. Labrura short, 

 broad, emarginate. Mandibles not prominent, simple. Eyes oval, rather 

 coarsely granulated beneath. Antennae arising under a slight frontal margin, 

 eleven-jointed, first joint stout, second nearly as stout but longer, third more 

 slender than the second and shorter, 4 — 5 — 6 short but longer than wide and 

 together a little longer than the third, seventh broader, eighth smaller than 

 the seventh, last three joints forming an oblong club, the terminal broader and 

 longer than the preceding. Maxillary i^alpi slender, first joint short, second 

 and third nearly equal and not stouter than the first, terminal joint slender 

 acute at tip, nearly equal in length to the preceding two. Prosternum very 

 short in front of the coxse, the cavities angulate externally and closed behind. 

 Mesosternum moderately separating the coxse, vertical between them and 

 rather strongly carinate. Metasternum moderate in length, the coxse con- 

 tiguous. Abdomen with six segments, the terminal scarcely visible. Legs 

 rather short, the femora stout, tibise slender, not spinulose externally and 

 with very minute tibial spurs. Body oval, convex, partially contractile. Tarsi 



