48 BULLBTIN 10, IIMTKU 8TATEH NATIONAL Ml'SElM. 



(J«MniH II. — SpiKonoi.us Brainlt. 



Spiroholnit Hrtiiitll, Bull. Soi . Imp. Nat. Mom., L1)'J, IKU. 



Tli« siibjji'iR'ia iin* (h'liii4>4l ah ToIIowh: 



n. UiiHul part of the dorsal pliitcs without acohina Si*iitoii<ii.i'H KarMcli. 



ati. Basal part of the dorsal phites with Miohiiia Kiiinoc'KINL'h Karsch. 



SiibgtMiiis Khinovrinun. 



5. Spirobolua marginatua (!<ny). 



JuliiH iiianiiiiitluH Say. Joiini. Acad. Nat. Sci. I'hila., lOT), 1KL>1. 

 SpiiobitliiH iiKtryiiiiitiiH \V«)(m1, Trans. Aiiht. I'liihis. So*-,, lit)?, IHtJ."*. 



Dark brown; Hcjfiiu'nts cil^a'd with liiownish fimfoiis; first and last 

 st'jjnu'iits {iiecn or brown; tret and antenme brownish mI. Hobiist, 

 not attcMiiiati'd anteriorly, the anterior tour or tive sejrn nts soinewiial 

 depressed, not smooth. Veit**x sin«>oth, with taint r'-.i<Mhitiny: lines, 

 sparsely puiietate, most nmm'rons between and behind eyes; median 

 suhns inti'rrnpted; <lypeal t'oveohe H-UK Antenna* short, not icaeh- 

 iiif; the posterior boitler of lirst sejjment. lOyes indistinct, siibtrian- 

 gular; ocelli, 3(>-40, arranoed in (J series. Sejjnients, 47-r»2. First se<;- 

 ment with tlu^ sitles subaenl.-, uiarjjinat*', the anterior border nearly 

 straij-ht, densely pnnetate; second se^nicnt produced forwanl into a 

 moderately lar<ie subtpiadrate plate. Other sejiinents ecpially punc- 

 tate on both divisioTis, stria* mo«lerate, decurved beneath. Last sejj- 

 ment pointed, but not exteiidin;: beyond the anal valves, tiiu'ly piinc- 

 tite; anal valves mar<iinate; [)unctate; anal s(;ale obtusely anjifled, 

 punctate. liei>u<;iiatorial pore placed on the anterior tlivisi<m, lar^e, 

 transverse suture bent. Pairs of feet, SS-IO'J, extendin^^ beyond the 

 sides of body. Male: the two anterior pairs »>f feet more robust than 

 the rest; coxa* of the 3-4 pairs most produced. Ventral plate pro- 

 duced into a short, rounded lo]>e. (Jenitalia: internal part of the an- 

 terior plate not higher than the ventral plate, external part with the 

 til) somewhat rounded, i)roduced ba(;k wards and outwards; i)Osterior 

 plate divided at the base, the outer grooved, through which runs the 

 inner, ends of ))otli rounded and more or less roughened. Length of 

 body, 4r)-10()""" ; wi«lth, o-K)""". 



Habitat. — Eastern United States. 



I have examined numerous specimens of this species from Bloom- 

 ingtou, Ind., and one large fenutle from lirooksville, Ind., collected 



by Mr. Amos Butler. Specimens 50' long ditler in color from the 



full grown examples, by being dark green. 



Young individuals ditler from adults as toUovvs: 



Length. 



WuUh. |segment8.| ^f^^f 



Eyea. 



