28 University of Michigan 



coarser and more numerous prickles over the stoma-saddles, and 

 the more widely separated spinules of the caudal margin with the 

 intervening prickles which are lacking in colombiana. 



Pselliodes natalana, sp. nov. 

 Pselliophora nigrovittala Chamberlin (nee Meinert), Bull. M.C.Z., 58 

 (1914), p. 221. 



Dorsum with a median longitudinal fulvous stripe as wide as 

 or posteriorly wider than a black fuscous stripe each side of it, 

 with a continuous narrower fulvous or orange stripe along the 

 lateral borders of plates. Stoma saddles pale excepting tips of 

 stoma which are fuscous. Head yellow above excepting an 

 irregular narrow dark stripe each side of middle between and caudad 

 of eyes and a broader dark stripe mesad of base of each antenna 

 and down the clypeus across the lower part of which the two 

 stripes are united. Venter fulvous. Legs in general yellow. 

 Femora of legs not annulate but with two dark spots on caudal 

 side of which proximal one is smaller or sometimes absent, other- 

 wise clear yellow. Tibiae each with two annuli widely interrupted 

 both above and below. Metatarsi a little darker on anterior and 

 posterior faces at base. 



First tarsus of seventh legs with eleven segments, the second 

 with thirty-nine. First tarsus of ninth leg with fifteen segments, 

 the second with thirty-three. 



Caudal margin of ordinary tergites mesally weakly incurved. 

 Last tergite clearly more strongly narrowed caudad than that of 

 colombiana, the caudal margin strongly convex. 



Length, 27 mm. 



Brazil, Rio Grande del Norte: Natal. (W. M. Mann, Stanford 

 Expedition, 1911.) T^q^e, M.C.Z., 2171. Paratypes, M.C.Z., 

 1460, 1461, 1462, and 1453. 



The types of this species were, as indicated above, originally 

 referred to P. nigroviitata (Meinert), but further study shows them 

 to be distinct. The two species are readily distinguished by the 

 differences in markings of the legs, etc. 



