192 THE MYKIAl'ODA OF NORTH AMERICA. 



meters ; that of the latter is founded on an entirely distinct set — is. in truth, a description 

 comparative not with the allied genera, but with those of the Iulidse. In "Ann. and 

 Mag. Nat. Hist,," Mr. Newport described a genus Platops. His description has appa- 

 rently not the slighted relation to that of M. Brandt; but Platops seems to be the same 

 as Spirostrephon, from the fact that the type of the latter is one of Mr. Newport's new 

 speeies. Mr. Gervais unites Lysiopctalum and Platops together, whether correctly or not 

 I cannot say, not having seen enough specimens. Although with my present light it 

 appears probable that they are one, yet, out of deference to the opinions of Messrs. Brandt 

 and Newport, they are in this paper considered distinct. 



Genus SPIROSTEEPH< >N. > 



S. LACTARIUS. 



S. brunneus, lineis rufo-brunneis tribus ornatus; scutis valde et arete carinatis; segmentis 59. 

 Brown, ornamented with three reddish brown lines; scuta closely and strongly keeled ; segments 59. 



Var. Nigro brunneus, haud lineatus. 

 Var. Blackish brown, not lineatc. 



Julus i.actarius, Sal/, Journ. A. N. S., 1st series, vol. ii, p. 104. 



1'latops lineatus, Newport, Ann. and Mag. Nat. Hist., vol. xiii, p. 267. 



Spirostrephon lactarius, Brandt, Recueil, p. 90. 



Lysiopetalum lineatum, Gervais, Apteres, vol. iv, p. 133. 



Cambala lactarius, " " " p. 134; Exped. L'Aiuer. du Sud (Castelneau), Myriap., 



p. 17. 

 Reasia spinosa, Swijci; Proe. A. N. S., 1856, p. 109. 

 " Heana ciiinosa, Sceyer," Gervais, Exped. L'Amer. du Sud (Castelneau), Myriap., p. 14. 



Haud. "Julus lactarius, Sat/;" Gray et Newport. 



Cambala lactarius, Gray, Griff., Animal Kingdom Ins., pi. 135, fig. 2. 

 " " Newport, Ann. and Mag. Nat. Hist., vol. xiii, p. 2tit5. 



The color in this speeies varies from a very light to a very dark brown. The ornamental 

 lines are generally very distinct, but may be entirely absent, especially in those specimens 

 which have a blackish tint. 



The head is somewhat omarginate in its superior posterior border. The vertex is dark 

 colored, convex, medianly obsoletely canaliculate, and copiously minutely distinctly punc- 

 tate. The anterior aspect is rather narrow, lighter colored, and provided with numerous 



'• Brandt. 



