192 



THE MYRIAl'ODA OF NORTH AMERICA. 



racters ; 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 Iulidee. In "Ann. and 

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

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

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

 species. Mr Gervais unites Lysiopetalum and Platops together, whether correctly or not 

 T 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. 



( I bnus SPIROSTREPHON.* 



S. LACTARIUS. 



S. brunneus, lineis rufo-brunncis tribus ornatus; seutis vaklc ct arete carinatis ; segmentis 50. 

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



Var. Nigro brunneus, baud lineatus. 

 Var. Blackish brown, not lineatc. 



.Julus laotarius, Say, Journ. A. N. S., 1st series, vol. ii, p. 104. 



PLATOPS lineatus, Newport, Ann. and Mag. Nat. Hist., vol. xiii, p. 207. 



SPIROSTKEPHON LACTARIUS, Brandt, Recueil, p. 00. 



LiTSlOPETALUM linkatum, Gervai*, Apteres, vol. iv, p. 133. 



Camhala lactarius, " " " p. 134; Expcd. L'Amer. du Sud (Castelneau), Myriap., 



p. 17. 

 REA6IA spinosa, Sceger, Proc. A. N. 8., 1S56, p. 109. 

 "Hkana ciunosa, Sasaer," Gervais, Exped. L'Amer. du Sud (Castelncau), Myriap., p. 14. 



Baud. "Julus lactarius, Say;" 6 'ray et Newport. 



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

 » " . Newport, Ann. and Mag. Nat. Hist., vol. xiii, p. 266. 



The color in this species 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 cmarginatc 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. 



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