15(5 



THE MYRIAPODA OF NORTH AMERICA. 



Testaceous ; cephalic segment subovate, minutely punctate ; antennse 25 articulate ; mandibular teeth produced, 

 slender; labial teeth 8 — 10, the inmost two on each side generally coadnate ; feet generally yellowish; basal joint 

 of tho last pair within with 5—7 spines, beneath 7—10 arranged in a threefold series, angular process with 

 8 — 10 spines ; lateral anal appendages elongate, minutely profoundly punctate, with 5 — 7 apical, and a marginal 

 spine on each. 



S. HEROS, Girard, Marcy's Report of Explorations on the Red River, p. 272, pi. xviii. 

 " " ' Wood, Journ. A. N. S., new series, vol. v, 1863, p. 18. 



Var. Castaneioeps. 



8. viridis; capite antonnisquc rubro-castaneis ; podibus plerumquc lutcolis, intcrdum viridibus ; pan's postremi 

 articulis basalibus saturate viridibus. 



Green ; head and antennse reddish chestnut ; feet generally yellowish, sometimes green ; basal joints of last pair 

 very deep green. 



S. castaneioeps, Wood, Proc. A. N. 8., 1801, p. 11; Journ. A. N. S., new scries, 1863, vol. v, p. 18. 



The prebasilar fold is connate with the basilar segment, the suture is generally, how- 

 ever, well marked, existing as a deep groove. The cephalic segment is slightly cmar- 

 ginate between the antennae. The labial teeth vary from 8—10 in number; there will 

 sometimes be four on one side and five on the other, the external tooth apparently being 

 the missing one. The antennse are 25-jointed. Out of nearly a hundred specimens that 

 I have examined, only two or three had one or two supernumerary joints developed. 

 The scuta are polished, generally minutely and sparsely punctate, often obscurely bicari- 

 natc, the posterior with their lateral margins elevated. The last pair of legs are rather 

 robust, with the basal joint longer than the tibial. The scuto-episcutal sutures are appa- 

 rent, the stcrno-episternal very well marked. Length 5 J inches. 



JTab. Georgia, Alabama, Louisiana, Texas, New Mexico, &c. 



