•>^ Nortk Ai)ieric((u Julidw. 



4. JULUS STIGMATOSUS Brandt. 



JiihiK puiirtdtii.^ Say. Jouni. Acad. Nat. Sci. P'lila., 102, 1821 (preoccupied). 



Julus .sti(/)it(ito8iis^rA\K\{, Recucil. 88, 1840. 



Pale brown ; posterior border of segments dark ; a lateral row of brown 

 spots ; antennae dark, feet pale. Slender, smooth, shining, not pilose. 

 Vertex without a median sulcus, setigerous foveoljE present. Anten- 

 nae subclavate, exceeding the width of body. Eyes distinct, triangu- 

 lar or sub-rotund ; ocelli 20-40, arranged in 5-7 seiies. Segments, 

 35_45. Sides of tirst segment striate. Other segments moderately 

 striate beneath : last segment smooth, obtusely rounded, pilose ; anal 

 valves not marginate, pilose ; anal scale small, rounded, pilose. Re- 

 pugnatorial pore small, placed in the posterior division, not touching 

 the suture, which is straight. Pairs of feet, 50-75, slender, extending 

 beyond the sides of body, sparsely pilose. Male: mandibulary stipes 

 not much produced beneath. First pair of legs short and thick, im- 

 cinate, sparsel}" piios'-. Genitalia exposed. Length of body, 8-13 

 mm. ; width, .5-. 8 mm 



Habitat, Virginia and Indiana. 



I have examined about a dozen specimens of this species. It 

 varies somewhat in the shades of color, some being ahnost black. 

 Only having one full grown male, I have not attempted to give a 

 description of the genitalia. 



One young specimen differs from the adult as follows : 



Leugth. Width. Eyes (ocelli). Segments. Feet. 



7 mm. .4 mm. 19-5 33 39 



Genus II. SPIROBOLUS Brandt. 



Spirobolus Brandt, Bull. Soc. Imp. Nat. Mos., 202, 1833. 



The sub-genera are defined as follows : 

 a. Basal part of the dorsal plates without scobina. Spikoboi.us Karsch. 

 aa. Basal part of the dorsal plates with scobina. Riiinocrinus Karsch. 



Subgenus Rhinocrinus. 



' 5. SPIROBOI.US MAKGINATUS (Say). 



Julus marginatus Say, Journ. Acad. Nat. Sci. Phila., 105, 1821. 

 Spiroholus marginatiis y( Qod, Trans. Amer. Philos. Soc, 207, 1865. 



Dark brown ; segments edged with brownish fuscous ; first and last seg- 

 ments green or brown ; feet and antennae brownish red. Robust, not 



