KEW AMERICAN ACARINA. 15 



IVotli rus excisus iiov. sp. — Length .7 mm. Pale bro-mi, legs a little darker ; 

 body quite Hat ; dorsum irregularly roughened ; cephalothorax sub-triangular, 

 truncate in front, from each anterior angle projects a stiff curved hair ; stigmata 

 elevated, prominent, with a short capitate seta ; abdomen truncate in front, 

 slightly broader in the middle, deeply emarginate behind, from each posterior 

 angle projects a roughened clavate hair, and a snb-clavate hair from each side 

 just before the angles, beneath tip a median pair of smaller clavate hairs; start- 

 ing from near the base there is each side a sub-median ridge, which near the tip 

 curves toward the posterior angles, at point of curvature is a short transverse 

 ridge ; on each side margin there are three or four very short clavate hairs ; the 

 sides, venter and legs, are all roughened, the latter with stiff, curved bristles, finer 

 near tips ; most of the hairs on the body when much magnified are seen to be 

 serrate ; the form of the cephalothorax is caused by the development of the upper 

 surface over the anterior end of the head, the latter, as usual, being blunt pointed. 



Sea Cliff, L. I., N. Y. On the bark of spruce trees, where it is 

 much protected by its color. 



Kotlirus rugulosn»< nov. sp. Length .7 mm. Dark brown, abdomen 

 paler; related to X excisntf. but the abdomen is truncate behind, not deeply emar- 

 ginate, in some specimens a little rounded ; there are four large clavate hairs on 

 each side margin, the margins are roughened, but the general surface of the dor- 

 sum is smooth, the abdomen is as wide in front as behind, and but slightly wider 

 in the middle ; the two hairs, at tip of cephalothorax, are much more clavate than 

 in N. excisus, the seta of stigmata is clavate ; the legs are roughened and furnished 

 with stiiF, curved hairs. 



Sea Cliff, L. I., N. Y. Under loose bark of dead trees; a speci- 

 men from Chicago, 111., seems to be the same species. 



L.IODES Berlese. 



This genus differs from Nothnis in having the dorsum of the ab- 

 domen composed of concentric rings; the legs are more slender and 

 smoother, more like Orlhata than Nothrus, in that the patella is very 

 short compared with the femur and tibia. 



We have but one species, which was discovered and described by 

 Say. 



Liiodes concentricus Say. 



Orihaia concent rica Say. Comp. Writ. LeConte Ed. 



Length 1.3 mm. Black ; cephalothorax broadly ti-iangular, narrowed behind, 

 margins serrate, seta short, clavate ; abdomen elevated, dorsum composed of four 

 concentric circles, connected to each other by curved lines or ridges, the circles 

 are not perfect, but elongate and pointed behind, the central one is divided by a 

 median line, which is connected to the sides by oblique lines ; there are a few fine 

 hairs on the anterior margin of the abdomen ; sides and venter granulate, legs 

 quite long, smooth, and with a few simple white hairs. 



Washington, D. C. Several specimens under bark of an elm tree. 

 Say had it from Pennsylvania ; Enterprise, Fla. (H. G. Hubbard). 



TEANS. XM. ENT. .SCO. XXII. FEBRUARY, 1895. 



