REPORT OK THE STATE ENTOMOLOGIST 253 



Achorutes diversiceps n. sp. 

 (Ord. 'Jhysanura: Fam. Podurid.*:.) 



Of examples of a Podurid which came under my observation nearly 

 twenty-five years ago, at Center, N. Y., now known as Karner — a sta- 

 tion on the N. Y. Central Railroad midway between Albany and Sche- 

 nectady, — I had written as follows in the Country Gentleman for March 

 22, 1879, at page 327 : 



"A species closely allied to the above, [referring to Lipura jimetariai 

 now Aphorura armata], but somewhat larger in size and of a black color, 

 once came under my observation at 

 Center, N. Y., in most extraordinary 

 number. Many millions of individuals 

 must have been present, covering a 

 damp tract of sand in a roadway near Fig. 23.-Achorltes diversiceps, greaUy 



,,-,,. , J , enlarged; possibly unnaturally swollen. 



a .swam]), and filling the ruts made by (Original.) 



wagon wheels (to the depth of half an inch or more) in places. The 

 species has not been determined. It has been referred to the family 

 Lipurince, and seems ver^'^ much like the old European species, Podura 

 aqiiatica, mentioned from Greenland, and may possibly be identical with 

 it, according to Dr. Hagen, who has only seen dried and shriveled speci- 

 mens of it.'' 



Recent studies of some of the specimens in which the characters were 

 well brought out by treating them with a weak solution of potash lead us to 

 regard it as undescribed, as its characters differ from any description 

 accessible, and it is therefore described as new. 



Achorutes diversiceps n. sp. Figures 23, 24, 25. — Color a unifcrni 

 plumbe"us. Head wider than body, dorsal aspect subtriangular, occiput 

 hiiih. Antennae about two-thirds the length of the head, 

 sjjarsely setose, stout, four-segmented; segments one and 

 two nearly equal, three and four sli;^htly longer and stouter. 

 Eye-groups high upon the occiput, posterior to insertion 

 of antennae, each including seven or eight, and possibly 



ten, ocelli. Fig. 24.— Claw of 



Thorax and abdomen sparsely clothed with scattering ^^"^^^"^^^ '"" 

 hairs; body increasing in size to the fourtli abdominal greatly enlarged, 

 segment. Legs four-segmented, with scattering hairs, and ^ rigina .)} 

 bifurcate, curved claws (fig. 24). Ventral sucker prominent, with central 

 papilla, around which are several setae. Tenaculum or catch apparently 

 composed of a pair of broadly triangular pro- 

 cesses as seen from below. Base of spring or 

 elater two-thirds the width of the body and 

 tapering gradually to its apex, which is about 



1 I'r • 1 • i 1 ■ ii. -J Fig. 2=;. — Spring of Achorutes 



one-halt as wuie in ventral view; the paired pro- ui\eksiceks, very greatly en- 

 cesses arising from the base of the spring are '^ir.eed. (Original.; 



