of the North American Orlh»plera. 119 



* 3. E. ri-AvociNCTA, nov. sp. 



Prothoracic shield rather dark brown, slightly paler along 

 the median line, bordered throughout with a pale yellow- 

 ish band, forming only a very narrow edge posteriorly ; 

 broader in front, and quite broad at the sides, covering all 

 the defiexed border ; the edge at the sides and in front is 

 slightly raised ; wing-covers scarcely reaching tip of ab- 

 domen, reddish brown, with the anterior half of the outer 

 margin paler, with a yellowish tinge ; wings not half the 

 length of the wing-covers ; abdomen above very dark 

 brown ; below dark brown, the terminal segment being 

 darkest; legs yellowish brown, with spines as in E. lith- 

 ophila ; head reddish brown; sides below antennsB yellow- 

 ish ; eyes black; antennae dark brown, paler toward tip; 

 third joint rather larger than the two succeeding joints, 

 and equal in size to the second. Length of body, .56 in. 

 " In woods, under a stone." — H. 



Mass. (H. Coll.) Western States, (Mus. Comp. Zool.) 

 Lake Superior, (Mus. Comp. Zool.) 3 specimens. 



CRYPTOCERCUS, Nov. gen. (KpvirTos, kc/3kos.) 



A genus allied to, but very distinct from, Polyzostceria, 

 Burm. The head is not large, much flattened, front 

 sloping strongly inwards; prothorax broader than long, 

 considerably arched, swollen, with the front border ex- 

 tending over the head slightly upturned to form a sort 

 of hood ; border of prothorax thickened in front con- 

 siderably, at the sides more narrowly, here forming a 

 slightly raised edge, which extends along the whole side 

 of the body. Both sexes wingless ; the meso- and meta- 

 thorax not so arched as the prothorax ; the hind border 

 of the mesothorax not turned backwards at outer angle ; 

 that of the metathorax only in a very slight degree; ab- 

 domen not flattened, but quite fuD, especially on posterior 

 half; the abdomen slightly longer than the thorax; the 

 segments nearly equal in width, with the exception of the 



