170 COLOMBIAN DERMAPTERA AND ORTHOPTERA 



lack an acute-angulate projection, as found in molita. The sig- 

 nificance of these features can not at present be determined, 

 though probably indicating specific distinction. 



LIBETHROIDEA new fi;enus 



Related to Lihethra and Ocnophila, difl^ering from the former 

 only, but strikingly, in the distal abdominal segments of the 

 female, in which sex the ninth (ultimate) segment is produced, 

 elongate, extending far beyond apex of abdomen, with apex 

 rounded. 



Genotype. — Lihethroidea inusitata new species. 



We would place Giglio-Tos' Bacunculus sarmentunt and palea 

 in this genus; the differences in the operculum of these species are 

 unusual for congeneric forms and when both sexes of these species 

 are known, further generic separation may be found necessary. 



Generic Description. — Four caudal tibiae lacking an impressed 

 ventral triangular area distad. Median segment very much 

 shorter than metanotum, strongly transverse. Ocelli absent. 

 Tegmina and wings absent. Head elongate. Antennae elongate. 

 Abdomen of female longitudinally carinulate. Ninth (distal) 

 dorsal abdominal segment of female very elongate, lanceolate, 

 decidedly longer than any other dorsal abdominal segment and 

 extending much beyond apex of abdomen. Operculum of female 

 very elongate, concealing ovipositor valves and cerci,as in Lihethra, 

 rounded distad with apex briefly cleft, the lateral portions of the 

 apex broad. Cephalic femora strongly compressed. 



Libethroidea inusitata new species (Plate XXIII, figs. 7 and 8.) 



Apparently closely related to L. palea (Giglio-Tos), differing in 

 having the apex of the operculum cleft and in coloration, which is 

 not immaculate in that species. The size is also smaller. Com- 

 parison of material of these species would probably show other 

 differences. 



Type. — 9 ; Altas de las Cruces, near San Antonio, Cauca, 

 Colombia. Elevation, 7200 feet. October, 1908. [United States 

 National Museum.] 



Size medivnn, form niotleiately .slender as compared with the species of 

 Lihethra. .Antennae simple, elongate, reaching to near median portion of 

 abdomen. Head elongate; occiput smooth, except for (three and four) minute 

 nodes arranged longitudinally near the caudal margin hack of the eyes. Eye 

 small, length contained four times in check. Pronotuin decidedly sliorter than 



