THE MYRIAPODA OF NORTH AMERICA. 1S1 



Tji trli t orange, slender, be; utifullj polished ; cephalic segment deep orange, large, anteriorly slightly eniarginate, 

 together with the labium and mandibles copiously profoundly punctate ; antennas rather long, densely pilose; 

 anteriorly almost pubescent; labium slightly (sometimes obsoletely) emarginate, medianly canaliculate; mandibles 

 large, thick, sometimes indistinctly quadridentate, with a single (sometimes two) rather large tooth; feet short, 

 very sparsely pilose, on each side (in male ?) 61, (in female ?) 63. 



G. bipuncticeps, WuoiJ, Journ. A. N. S., 18G3, p. 45. 



The surface of the head, under a very highly magnifying lens, has the appearance of 

 being very densely and minutely punctate. This is very general in the family, but per- 

 haps is a little marked in this species. 



The general arrangement of the larger punctations on the cephalic segment is as fol- 

 lows : On each side of the posterior mesial portion there is a longitudinal series of punc- 

 tations ; on each side of the latter is a broad patch of the same, and anteriorly they are 

 disposed in transverse series. No such method is discoverable in the preceding species. 

 The color in all the specimens I have seen is somewhat lighter, and the body less robust, 

 and perhaps more uniform than in G. breviconds. The labium is of the same shade as the 

 cephalic segment, but the basilar and subbasilar are colored like the body. The dorsum 

 has occasionally an indistinct dark median stripe. The labial sulcus is more distinct ante- 

 riorly, but is sometimes quite obsolete. The scuto-episcutal and sterno-episternal sutures 

 are very distinct. The sterna have a median groove. I have seen an individual, belong- 

 ing to the collection of the Museum of Comparative Zoology, which has 65 pairs of feet 

 on each side, but yet in other respects agrees entirely with the others. 



Hub. S. Illinois, K. Kennicott; Sonora, T. D. Graham. — Smithsonian Collection. 



Genus STRIGAMIA, Gray. 



Antennas approximate. Segmentum cephalicum parvum (Fig. 20 c), breve, plerumque subtriangulare, antice 

 angustatum. Corpus depressum, antice attenuatum. Segmenta pedesque numerosae. 



Antennae approximate. Cephalic segment small, short, generally subtnangular, anteriorly narrowed. Body 

 depressed, anteriorly attenuate. Segments and feet numerous. 



Geophilus, Leach, partim. 

 STRIGAMIA, Gray, partim. 

 Geophilus, Newport, et imitatores. 



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

 to the section Arthronomalus of Newport ; and Arthronomalus must be 

 replaced by Geophilus, and a new name given to Geophilus, Newport. 



Fig. 20. 



