AMERICAN COLEOPTERA. 205 



fimbriate at tip with unequal spinules, the spurs short. Length .10 — .12 inch ; 

 2.5—3 mm. (PI. V, fig. 16). 



This species appears to resemble Catopa depressus Murr. in form, 

 but as he places that in the series with the mesosternum simple there 

 does not appear to be any further relationship. 



Occurs from Nova Scotia to New York, very rare. 



AI>i:L,OPSi Tellkampf. 



Oval, narrower behind, convex, body above arched. Head suddenly nar- 

 rowed behind, the angles prominent as in Ptoniaphagus, occiput elevated, 

 received against the apex of the thorax. Eyes small, normally placed, without 

 pigment. Antennse slender, a little longer than the head and thorax, the 

 basal joint received in repose in a deep groove at the side of the head, the last 

 five joints forming an elongate loose club, the eighth joint being shorter and 

 a little narrower than the seventh or ninth. Maxillary palpi with the last 

 joint slender, subuliform, third obconical truncate, second slender. Middle 

 coxse separated, the mesosternum with a strong keel-like carina. Metasteruum 

 short, body apterous, posterior coxae contiguous. Tarsi slender, the anterior 

 dilated in the male, the first joint of posterior equal to the two following. 

 Tibiae very finely spinulose externally, the spurs small. 



The anterior tarsi are five-jointed in both sexes. This genus is 

 very closely allied to Ptomaphagus and I am in doubt whether it 

 should be retained as distinct. The only differences are: the small 

 eyes, the deep depression at the side of the head and the very strong 

 mesosternal carina. The antennae are also longer and more slender. 

 It may be hardly necessary to remark that the European species 

 referred to Adelojjs do not belong there, as they have a narrow head 

 deeply inserted in the thorax and absolutely deprived of eyes. For 

 these the name Bathyscia Schioedte, should be used. 



A. llirtllS Tellk. — Oval, narrower behind, pale brown, moderately shining, 

 clothed with yellowish brown pubescence. Head finely and sparsely puuctu- 

 late, pubescence arranged in a radiating manner from the centre of the vertex. 

 Thorax nearly twice as wide as long, sides gradually arcuate narrowing from 

 base to apex, hind angles rectangular, base squarely truncate, surface sparsely 

 punctulate at middle, strigose at the sides. Scutellum short, broad, usually 

 concealed in repose. Elytra a little narrower than the thorax, sides feebly 

 arcuate gradually converging, apex gradually narrowed, sutural angle obtuse % , 

 acute 9) surface rather coarsely strigose, the lines of minute punctures slightly 

 oblique, sutural stria entire deeply impressed. Body beneath very finely punctu- 

 late, femora strigose. Length .08 — .10 inch; 2 — 2.5 mm. (PI. VI, fig. 1). 



Occurs in Mammoth Cave, Kentucky, as well as in other caves on 

 the western side of the mountains. 



At this point it is proper that the attention of observers should 

 be directed to the collection of the coleoptera in our large caves. 

 It seems hardly probable that but one Silphide should live in them 

 and it not eyeless. 



TRANS. AMEK. ENT, SOC. VIII. (34) SEPTEMBER, 1880. 



