46 ON THE CHILOPODA OF NORTH AMERICA. 



Gen. 3. GONIBREGMATUS, Newp.* 



" Antennas filiformes, subapproximatre. Segmentum cephalicum breve, transversum, cordiforrne, antice acute 

 triangulare ; basilare cephalico latius, subbasilari brevius. Mandibulrc magnre, arcuata3, prominentes, 

 contorts. Labium brevissimum, transversum, margine integro piominente. Corpus subconvexum 

 elongatum sequale; segmentis numerosis, posterioribus 2 vel 3 incrassatis tuberosis." 



This genus has not as yet been found on the North American Continent. 



Gen. 4. STRIGAMIA, Ssegerf. 



Antennae approximatae. Segmentum cephalicum parvum, breve plerumque subtriangulare, antice angus- 

 tatum. Corpus depressum antice attcnuatum. Segmenta pedesque nuinerosae. Styli anales breves, 

 antenniformes. (Fig. 11.) 



Geophilus, Leach, p. 



Strigamia, Gray, p. 



Geophilus, Newp., et imitatores. 



As we have before shown, the type of Leach's genus Geophilus 

 belongs to the section Arthronomalus of Newp. ; and Arthronomalus 

 must be replaced by Geophilus, and a new name given to Geophilus, 

 Newp. 



S. bothriopus, n. sp. — S. laete rubens, robusta; segmento cephalico rare punctato, piloso; antennis 

 pilosis, inodice longis, haud acuminatis; mandibulis pilosis, intus dente niagno, conico, acuto armatis; 

 labio piloso, antice profunda emarginato, medio canaliculate; scutis pilosis, latis, brevibus, sine suturis; 

 pedibus plerumque flavis, dense pilosis, utrinque 50; paris postretni coxis magnis, foveis minutis 

 multis impressis ; sternis suturis sterno-episternalibus et sulco medio obsoleto signatis. 



The body is widest in the middle, but is much narrower at the anterior than at 

 the posterior extremity. The last pair of feet are scarcely longer than the preceding. 

 This species closely resembles E. rubem, Say, and may possibly prove identical with 

 it, as the descriptions of that form are as usual quite meagre. We have in our pos- 

 session two specimens from Broad Top Mountain, Huntingdon Co., Pa., and one from 

 Montgomery Co., collected by Mr. E. D. Cope. The largest is about an inch in 

 length. 



S. rubens. — S. " saturate aurantiaca ; linea mediana duplici nigra e segmento corporis primo ad 

 penultimum ducta, segmento cephalico subcordato, antennis pilosis, labio mandibulisque lasvigatis 

 punctis raris, mandibulis nigris pedum paribus 50. Long. unc. lj." 

 Geophilus rubens, Say, Journ. Acad. Nat. Sci. Philada. 1st series, vol. ii. ; CKuvr. Entom. i. p. 25; Gerv. 



in Ann. Sci. Nat. 1837, p. 52 ; Apt. iv. p. 320 ; Lucas, Hist. Nat. Anim. Art. p. 549 ; Newp. Ann. and Mag. 



Nat. Hist. xiii. p. 101 ; Linn. Trans, six. p. 435 ; Catal. Brit. Mus. Myriapoda, p. 87. 



" Hab. — In America boreali." 

 Species mihi ignota. 



* Proc. Zool. Soc. 1842, p. 181- f Proc. Acad. vol. viii. 



