458 PROCEEDINGS OF THE NATIONAL MUSEUM. volxxi. 



Genus CYRTODESMUS Gervais. 

 Cyrtodeamua Gervais, Apteres, 1847, IV, p. 92. 



Second segment with carinte broadly roimded, but not as much 

 exj^anded and decurved as in the other genera associated in the present 

 family. 



Segments evenly convex, densely velvety pilose. 



Lateral carina' with a deep notch in the posterior margin near the 

 base. 



llepuguatorial pores with the normal formula, located in the middle of 

 the carin;e, slightly laterad from the notch, raised on distinct papilhe. 



CYRTODESMUS VELUTINUS (Gervais and Goudot). 



(Plate XXIX, tigs. 3a, 3b.) 



Polydesmuft velitthiiis Gervais and Goudot, IJiill. Soc. Ent., Franco, 1844, 2(1 ser., 



II, p. xxviii. 

 Cyrtodesmns veluHnuH Gervais, Apteres, 1847, IV, p. 93, pi. xliv, fig. 5. 



Type. — British Museum. 

 Locality. — Colombia. 



Genus pNCODESMUS Cook. 

 Oncodesmus Cook, Brandtia, 1896, p. 28. 



The second segment is here much larger than in CyrtorlesmnSj and 

 the surface of the segments, instead of being densely and uniformly 

 hispid, is beset merely with coarse granules, giving the animal an 

 appearance very distinct from that of Cyrtodesmns. These differences 

 are supplemented by others which in the absence of more detailed 



notes can liot be stated till the types can be reexamined. 



» 



ONCODESMUS GRANOSUS (Gervais and Goudot). 



Polydcsmus f/ranosKs Gervais and Goudot, Ann. Soc, Ent., France, 1844, 2d ser., 



II, p. xxviii. 

 Cyrtodesmns grano8U8 Gervais, Apteres, 1847, IV, p. 93. 

 Oncodesmuf f/ranosus Cook, Brandtia, 1896, p. 28. 



Type. — British Museum. 

 Locality. — Colombia. 



CYLIOCYRTUS, new genus. 



Ty])e. — G. asper (Peters), from Colombia. 



First segment small, included between the enormously enlarged flab- 

 ellate carina*- of the second segment. 



Segments densely covered with rough tubercles; carinte notched at 

 base. 



Kepugnatorial pores located on a special tubercle or papilla. 



Supplementary margin regularly pectinate with long teeth. 



