34 ON THE CHILOPODA OF NORTH AMERICA. 



The antennas, owing to the shape of their joints have a peculiar beaded appearance. 

 The sterno-episternal and scuto-episcutal sutures are very distinct. The labium has 

 two indistinct (?sutural) markings, diverging from the anterior median portion. The 

 distal portions of the femora and tibiae of the last pair of legs are furnished with a 

 well marked median groove on the superior surface. 



354 | 1 | Choco, New Grenada. | A. Schott. | | Unc. 1 | 



C. ambiguus? Newp., Linn. Trans, six. 423. 



Our specimens are in a very bad state of preservation, and there is but a single 

 posterior leg remaining. It has five spines arranged in two rows on the inferior 

 internal as well as external margin ; yet we feel confident that a suite of specimens 

 would show that it belongs to G. ambiguus, Newp. 



? Scolopendra amhigua, Brandt. 



363 | 2 | Cape of Good Hope. | N. Pacific Explor. Exped. | Win. Stimpson, M.D. | Unc. 2| | 



There is in the collection of the Smithsonian, besides the above, a Cormocephalus 

 brought from Samoa by the United States Exjjloring Expedition. It belongs most 

 probably to an undescribed sj)ecies, but as the posterior pair of legs is lost, we will 

 not describe it. There are also three specimens, brought from Nicaragua by the North 

 Pacific Exploring Expedition, similarly mutilated, likewise probably undescribed. 



Gen. 3. RHOMBOCEPHALUS, Newp.* 



" Segmentum cephalicum elougatutn, subtriangulare ; subbasilare labiurnque angustlssima." 

 Not as yet found in this country. 



Gen. 4. CRYPTOPS, Leach.f 



Segmenta podopbora 21. Antennro 17 articulatce. Oculi nulli vel inconspicui. Labium cdentulum. 

 Scutum postremuni Scolopendrje vera illo simillirnuui. Pedum postremorum articulus basalis ple- 

 rumque inermis. Appendices analcs laterales obtusse. 

 " Cryptops hyalina, pallida, Isevis, lineis 2 longitudinalibus saturatioribus, capite antennisque ferrugineis, 

 pedibus postremis brunneis spinulis 5 in artieulo tertio tarsalive. Long. lin. 7." 

 " Crypt, hyalina, Say, Journ. Acad. Nat. Sci. 1st series, vol. ii.; id. Gluvr. Entom. 1, sp. 23; Gerv. in 

 Ann. Sci. Nat., Janv. 1837, sp. 3; Lucas, Hist. Nat. Anim. Artie, p. 546, sp. 3." 

 " Hah. In Georgia et Florida." 

 Species mihi ignota. 



" C. Milbertii, Gervais. — Point d'yeux; 22 segments, en comptant la tete d'un brun marron. Tete ar- 

 rondie, non engagee dans lo second segment. Plaques convexes non arrondies a, leurs bords posterieurs, 

 bordees. Segments tres inequax entre eux, les 1, 3, 5, 6, 8, 10, 12, 14, 16, 18, sont les nioins allonges; 

 le dernier est plus etroits et cylindriiide. En dessous, ces plaques sont un peu bombees et presque 

 egales. Les deux paires de pattes posterieures sont plus allongees que les autres et terminees par une 



*Linn. Trans, xix. p -i-~> t Linn. Trans, xi. p. 384. 



