70 GEO. H. HORN, M. D. 



20.— Abdomen with veiy few punctures at side, smooth at middle; marginal line 

 of posterior femur feeble and indistinct lobattis. 



21. — Abdomen with few punctures; marginal line of femur short. ..Iiirsutus. 



A. iiis<*nlptti!$ n. sp. — Oblong, moderately convex, black, feebly shining. 

 Antennse and palpi reddish brown. Head convex, densely and rather coarsely 

 punctured in a transverse space on the occiput, in front very finely and indis- 

 tinctly punctured. Clypeus at middle broadly, but feebly emarginate ; on each 

 side a small acute denticle, the sides arcuate, gente moderately prominent, obtuse. 

 Thorax nearly twice as wide as long, slightly narrowed posteriorly ; sides feebly 

 arcuate, hind angles very obtuse, base arcuate, the basal marginal line fine and 

 distinct, disc moderately convex, a slight depression each side, the surface mod- 

 erately coarsely punctured, the punctures denser toward the sides, rugose near 

 the front angles, finer and sparser behind the head. Elytra as wide at base as 

 the thorax, humei-i dentiform, sides arcuate, disc deeply striate, strise catenulately 

 punctured, intervals with a finely elevated carina along their middle. Mesoster- 

 num scabrous, opaque, with a shining obtuse carina between the coxse. Metas- 

 ternum opaque, subgranulate at the sides. Abdomen finely alutaceous, feebly 

 shining, coarsely, but sparsely punctured over their entire surface, segments 2-5 

 crenate along their anterior border. Anterior tibipe tridentate externally, not 

 crenate. Posterior femur coarsely sparsely punctate and alutaceous, the posterior 

 marginal groove entire and deep, the tibire without accessory spinule, the first 

 tarsal joint much longer than the long spur. Length .16-.18 inch ; 4-4.5 mm. 



Of this species I have seen but two specimens, collected in Florida. 

 The species was supposed by Dr. LeConte (Proc. Am. Philos. Soc. 

 1878, p. 402) to be scalptiUs Harold, and although it agrees fairly 

 with the description of that species there is no accessory spinule at 

 the inner angle of the apex of the hind tibia. It is most closely 

 allied among our species to cylindrus Horn ( Hornii Har.). 



Two specimens, Florida. 



A. liicaiius Horn. — Form rather robust, brownish, moderately shining. 

 Antennpe rufotestaceous. Head convex, coansely not closely punctate in a trans- 

 verse band posteriorly, sparsely obsoletely punctate at middle and distinctly 

 rugulose at the sides in front. Clypeus broadly emarginate, the angles of emar- 

 gination distinct, the sides oblique, slightly arcuate, genre prominent, but obtuse. 

 Thorax less than twice as wide as long, slightly narrower behind (when viewed 

 fi-om above) sides feebly arcuate, the margin crenulate, hind angles distinct ob- 

 tuse, base arcuate, the marginal line deep and entire ; disc convex, coarsely and 

 closely, not densely punctured, the puncture a little finer near the apical mar- 

 gin. Elytra as wide as the thorax, slightly oval, humeri dentiform, disc deeply 

 striate, strise not punctured, intervals rather acutely convex and with a row of 

 fine punctures on each side below the apex. Mesosternum carinate between the 

 coxffi, rather roughly scabrous in front. Metasternum coarsely and densely punc- 

 tured at the sides. Abdomen piceous, coarsely sparsely punctured over the entire 

 surface, segments 2-5 crenate in front. Anterior tibiiE tridentate externally, 

 obsoletely crenate above. Posterior femora coarsely sparsely punctate, the poste- 

 rior marginal moderately deep and entire, the tibia with distinct accessory spinule, 

 the first tarsal joint not longer than the long s])ur. Length .16 inch ; 4 mm. 



