CHAMBERLIN: HENICOPIDAE OF AMERICA NORTH OF MEXICO. 23 



greater length being the rarer. Subdensely clothed with hairs that 

 are shorter than those of oabitus. Articles 43-45 of which the first 

 two are largest, a succeeding series of about ten typically greatly short- 

 ened, those at the ends of the series being shortest, while the articles 

 distad of this series become clearly longer. 



Major dorsal plates, excepting the sixth, with the caudal margin a 

 little convex and rounded at ends and mesally incurved; the sixth 

 with corners obliquely excised with the intervening caudal margin 

 straight or slightly excurved. Caudal margin of minor tergites 

 straight, the corners of ninth and eleventh in most obliquely excised 

 though in some distinctly excised on one side only while in others 

 the ends of the caudal margin are merely more or less evenly curved 

 forwards. Dorsal plates with mostly four distinct longitudinal sulci, 

 one a little removed from each lateral margin and one a little each 

 side of the median line, shorter broken impressed lines wrinkling the 

 surface between them; a weaker transverse impression in front of 

 caudal margin. 



Ventral plates finely wrinkled transversely, mostly so on the caudal 

 half to two thirds of length, and a longitudinal furrow or impression 

 a little mesad from each lateral margin. Last two or three sternites 

 smoother; often with fine impressed lines running from caudolateral 

 edge cephalomesad but these short and not affecting the middle por- 

 tion of plate. 



Legs all long. First twelve pairs with tarsi undivided but w r ith the 

 tegument between the two parts not strongly chitinized and thus 

 more or less flexible, there being, however, no true joints. Tarsi of 

 last three pairs of legs truly biarticulate. First thirteen pairs of legs 

 with spinous tipped process or spur. First thirteen pairs of legs with 

 three well-developed claws; the fourteenth pair also with accessory 

 claws but these reduced. 



Anal legs long and slender and otherwise alike in. both sexes; nearly 

 half as long as body (7:15); longer than penult in about ratio 14:11. 



Coxal pores circular and rather small; 2, 2, 3, 2-3, 3, 3, 3; the more 

 proximal in each series smaller than the more distal. 



Caudal process of 15th coxae long, acute, and spinous tipped. 



Gonopods of male with the three articles all well clothed with long 

 bristles. Terminal spine often a little bent at apex. Penial process 

 cvlindrical or more or less narrowed or constricted proximally. (Plate 

 4, fig. 3). 



Gonopods of female with articles bearing long bristles ventrally, 

 but glabrous on dorsal surface. Claw long and acutely pointed and 



