164 



THE MYRIAFODA OF NORTH AMKIUOA. 



joint of penultimate pair armed with 5 spines on a terminal angular process and 1—2 others; last pair very 

 elongate, Sttbcylindrical, not compressed, basal joint much longer than the tibial, armed with 30 — 45 spines in 

 longitudinal series; angular process large, with 6 — 8 spines; lateral anal appendages densely punctate, elongate, 

 each with 8 — 12 apical spines, and sometimes 1 — I marginal. 



S. LONQIPES, Wood, Journ. A. N. S., New Series, 1863, vol. v, p. 2G. 



This species is closely allied to S. altemam, Leach, .but differs from the characters given 

 by Mr. Newport; first, in the mandibular tubercle (mandibular tooth of Newport), being 

 very large and having the lesser tubercle near to its base ; secondly, in the number of 

 spines on the basal joint of last pair of legs being from 30 — 45 instead of from 45 — 60 ; 

 and finally, by the roughness of the lateral anal appendages. Besides, the specimens agree 

 in possessing important characters not mentioned by Mr. Newport, and which it is fair to 

 conclude do not exist in his species. 



The head and its appendages are very large and stout. The antenna? arc generally 

 lighter in color than the body. The first scutum is much the smallest. The lateral mar- 

 gins of the anterior scuta are straightcr than those of the posterior, which are elevated. 

 The posterior margin of the terminal scutum is very strongly arcuate. The scuto-cpiscutal 

 sutures are traceable, but not so well marked as the sterno-episternal. The femur of the 

 nineteenth pair of legs is furnished with two small spines on its distal extremity ; that- of 

 the twentieth with one or two on its upper surface, and a well-marked terminal angular 

 process supporting five; small spines. The femur of the last pair is rather depressed than 

 compressed, and armed with 30 — 45 small spines, irregularly arranged in rows on its 

 upper, inner, and lower surfaces. The preanal scale is somewhat elongate, and narrowed 

 posteriorly. 



Hull. Florida. — Smithsonian Collection. 



S. BYSSINA. 



S. saturate viridis ant brunnea; capite dilute castaneo, ct labio mandibullsquc sparse punctatis; segments 

 cephalioo late ovato, antice loviter emarginato, segmento prebasali nullo; antennis luteolis, 18 articulatis, pube- 

 scentibus ; dente mandibulari gracile ; laninis dcntalibus latis ; dontibus labialibus 10, parvis, nigris, utrinque 

 tribus intimis coadunatis; pedibus gracilibus, luteolis, modico compressis; pare postremo supra complanato, subtus 

 valde convexo, marginibus snperioribus ct extemo et interne acutis ; articulo basali tibiali longiore et intus ct suh- 

 tus bi- vol tri-spinoso, processu angulari bifido vol tritido; superfioie veotrali brunneo-olivacyea ; appendicibus 

 analibus lateralibus profnnde dense punctatis, modice elongatis, singula spinis apioalibus 2 — 3, apicibus haud 

 incurvatis. 



Deep green or brown ; head light chestnut, with the labium and mandibles sparsely punctate ; cephalic segment 

 broadly ovate, anteriorly slightly emarginato, prebasal segment wanting; antennae yellowish, 18 articulate, pube- 

 scent; mandibular tooth slender; dental lamina; broad ; labial teeth 10, small, black, the inner three on each side 



