ON THE CUILOPODA <>F NoKTII VMERICA 



The antennae are sometimes green or blue, and in all <>f our specimens pubescent on 

 their distal portion. Their joints are short and almost globose. The scuto-episcutal 

 sutures are well marked, hut not so strongly as the sterno-episternal. The legs are 

 slightly compressed. The basal joint has all of its mar-ins well defined, so that it is 

 scarcely subcylindrical, but rather subparallelopipedal. The spines are arranged in 

 rows on elevated bases, so as to give the appearance of being on an interrupted crest or 

 raisedline. The apices of the lateral anal appendages are much prolonged, slightly 

 curved upwards, impunctate and almost diaphanous. This species is separated from its 

 southern representative, by the more rectangular and smaller cephalic segment and 

 the larger basilar, ly the more moniliform and fewer jointed antennae, as well as 1>\ 

 the differences in the structure of the lateral teeth and posterior pair of feet. We 

 were at first disposed to consider our specimen as representing a species distinct from 

 M. Gervais', but further examination has convinced us that that naturalist had a 

 specimen with reproduced hind feet; yet we think it worth while to append his 

 description, so that the correctness or incorrectness of our opinion may he more easily 

 shown." Besides the Smithsonian specimens, we have an individual from Massa- 

 chusetts belonging to the collection of the .Museum of Comparative Zoology. 



Table sh iations in s/,"-i/i<- characters. 



Specimens belonging to the Smithsonian /< fift 



267 I 3 I Illinois. I R. Kennicott. I I Una 2 



268 | 2 | " " | " 22 



*"S. inequidentu (S. iN.KijrmKN ;>.)-'■ Tote aubeordiforme tin peu elargie; doubles stries dorsales parallele 

 rontinues en dessus, assez peu marquees; bord posterieur du dernier segment triangulaire obtus ; stries infe- 

 rieurs faiblement divergentes; plaques des segment- subarrondies a leur bord posterieur; plaque preanale 

 drilatere etroite a bord posterieur plus etroit que I'anterieur, droit; angles subarrondies; pieces laterales 

 terminees en epine multifide tres-finement ponctuees; antennes longues nues; sallies dentiferes finement 

 ponctuees. a trois deut inegales, l'interne large, a bord libre rectiligne, la raitoyenne peu distincte, subarrondie, 

 l'externc aeparee par un as grand : pieds de derriere assez longs, forts, subarrondis, epineus en dis- 



sous et a la face interne : G .pines environs en dessous; et a peu pres 14 au bord interne, la derniere multifide, 

 a sept petites pointes inegales en couronne. Couleur ferrugineuse un peu nuaucee de verdatre ; antennes 

 pales ; tete, segment forcipulaire et partie posterieur plus ferrugineuse. Longeur de corps, 0.190 ; plus grande 

 ir. 0.022. Antennes, 0.035; pieds de derriere. 0.035.'' 

 " Des Etats Unis, a New- York, par M. Milbert, (Museum de Paris, 1824.") 



dens, Geryais, Tableau des Uyriapods Americains, (Exp. dans L'Amerique duSud, sept, part.) p. 30. 



7 



