NATURAL SCIENCES OF PHILADELPHIA. 13 



I. LAQUEAT0S. 



I. brunneus, interdum caeruleo tinctus ; antennis filiformibus, pilosis, 

 nonnihil clavatis ; segmentis 49 ; scutis et supra et infra valde aroteque cana- 

 liculatis ; mucrone loiigo et recto ; squama preanali triangula, vix acuminata. 



The color of this species is brown, sometimes bluish, mottled, almost areo- 

 lated, with light brown. The eyes are triangular, and are united by a dark 

 band. The head has its anterior margin broadly emarginate, denticulate and 

 furnished with two rows of distant rigid hairs. The antennae have their prox- 

 imal joints nearly cylindrical, and are light colored, with their articles indis- 

 tinctly tipped with white. The first scutum has rather small lateral processes, 

 and is ornamented on its anterior border with a dark band. The anterior 

 subscutum is deeply and closely canaliculate over the whole of its surface. 

 The anal scales are furnished with a series of long hairs along their valvular 

 margin. The posterior portion is generally adorned with a very few scattered 

 hairs, hut I have never seen it pilose. 



Length, three-quarters of an inch. 



This species differs from /. canaliculatus in its smaller size the absence of 

 hairs on the anterior, and their paucity on the posterior portion of the body, 

 and in the mucro being larger in proportion to the rest of the animal. Yet 

 they may possibly prove to be the young of that species. 



Hab Chester Co., Pennsylvania. Dr. H. C. Wood, Jr. 



I. Milesii. 



I. saturate brunneus ; antennis filiformibus, longis, pilosis, clavatis ; scutis 

 infra arete et valde, supra interdum obsolete, canaliculatis ; segmentis 33 ; 

 mucrone nullo. 



The color of this species is a very dark, almost black brown ; but the ante- 

 rior portion of the body, and especially the head, is lighter. The antennae 

 are very pilose, and quite strongly clavate. The eyes are connected together 

 by a black band. The anterior scuta have their lateral surfaces closely and 

 deeply canaliculate, but are almost smooth on their ucper surface. The pos- 

 terior are everywhere deeply channeled, although more so below than above. 

 There are a few hairs on the anal scales. The anal scutum is not mucro- 

 nate. It affords me pleasure to dedicate this species to Prof. Miles, who is 

 laboring so assiduously and successfully to develop the zoology of Michigan. 



Hab. Michigan. Col. State Agricultural College. Prof. Miles. 



I. CINEREFROXS. 



I. brunneus, cinereo annulatus ; capitis snperficia antica cinerea ; mucrone 

 nullo, squama preanali triangula, haud acuminata. 



The color of this species is dark brown. The anterior surface of the head 

 is an obscure gray color, with a dark band inferiorly. There is between the 

 upper and anterior surface of the head a well marked angle, almost an ele- 

 vated ridge. The lower margin is fringed with a few hairs, and is emarginate 

 and armed with a few denticules. The triangular eyes are connected by a 

 distinct, impressed line. On the upper portion of the anterior surface of the 

 head are two round, light dots surrounded by a darker tint. The antennae 

 are wanting in the only specimen, a female, that I have seen, which is so 

 mutilated that I cannot say certainly of how many segments it was composed ; 

 the number, however, was probably either 34 or 45. The first scutum has 

 very small, lateral processes. It is light brown, bordered with a dark band, 

 edged with a grayish tint. The anterior portion of the body is of a lighter 

 shade than the posterior, and has the grayish annuli more distinctly pro- 

 nounced. The anal scutum is not raucronate. The anal 9cales are not pilose 



Hab. -Oregon. Smithsonian Institution. 



1864.] 



