Eleventh Report of the State Entomologist 253 



Achorutes diversiceps n. sp. 



(Ord. 'J'hysanura: Fam. PoDURiDiE.) 



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- 



y 



nectady, — ■ I had written as follows in the Country Geutleniaii for Marcfe- 

 22, 1879, at page 327 : 



"A species closely allied to the above, [referring to Lipiirafimctaria, 

 now Aphorura annata\ but somewhat larger in size and of a black color, 

 once came under my observation at .ji^^:^*^^!^^^^^^ 



Center, N. Y., in most extraordinary <r!g.ci^^y^| I [ f^^^^W, 

 number. Many millions of individuals j^^^, -^^ — 'f — rfe^^ 

 must have been present, covering a jflf)f ^^^^^'^ 



<3amp tract of sand in a roadway near Fig. 23.-Achorltes diversiceps, greatly 



1 j-i,- ^, ^ J 1 enlarged; possibly unnaturally swollen. 



a swamp, and nllmg 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 

 Lipurina, and seems very 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 diversicep.s n. sp. Figures 23, 24, 25. — Color a uniform 

 plumbc' us. Head wider than body, dorsal aspect subtriangular, occiput 

 high. Antenna about two-thirds the length of the head, 

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

 two nearly equal, three and four slii^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— Giaw of 



Thorax and abdomen sparsely clothed with scattering Achorutes di- 



,. ij- ■ •• ir 111-, versicei's, very 



hairs; body increasing m size to the fourth abdominal greatly enlarged, 

 segment. Legs four-segmented, with scattering hairs, and ^'-'■■'^'"ai.) 

 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 

 one-half HS wide in ventral view; the paired pro- ""'l^Al^^tv^rl ^r^^^'^^l 

 cesses arising from the base of the spring are larged. (Original.; 



