4 University of Michigan 



Otocryptops ferriigineus (Linne) 

 Scolopendra ferruginea Linne, Syst. Xat., 12th Ed. (1767), i, part 2, p. 1063. 



Colombia: San Lorenzo, 4,500 ft. Six adults and several 

 young collected July 2, 3, 4, and 7, 1913. 



These specimens are typical and uniform in all characters. 



Otocryptops ferrugineus inversus, subsp. nov. 



Plate I, Figs, i and 2 



Specimens from Guiana agree in general with those of the 

 preceding species excepting more particularly the armature of 

 the prosternum. In typical ferrugineus four teeth are present 

 with the two mesal ones much larger and carried farther forward 

 than the laterals which are often much reduced. In the present 

 form there is a smooth-edged dental plate across anterior margin 

 of prosternum much as in melanostomtis l^ut with the ends the 

 highest part, the edge concave between the ends. In one specimen 

 the outer ends of the plate are abruptly and angularly extended 

 forward, subdentiform. The margin of prosternum beneath the 

 plate is very obtuse, nearly straight, not produced forward at 

 middle so far as in t}^ical ferrugineus (Plate I, Figs, i and 2). 

 The specimens are somewhat larger than ordinary ferrugineus, 

 the type being 62 mm. long. 



British Guiana, Dunoon: sand-hill forest, August 18, 1914; 

 Labba Creek, sand hills, August 25, 1914. One specimen from 

 each place. T^-pe, M.C.Z., 2174. 



Tidops echinopus, sp. nov. 

 Plate I, Fig. 5; Plate II, Figs. 6 and 7 



Body in general ochraceous. Head and prosternum with 

 prehensors pale chestnut. Antennae and legs fulvous, or the 

 latter when in full color ochraceous like the body excepting the 

 last pair. 



