172 COLOMBIAN DERMAPTERA AND ORTHOPTERA 



The genotype of Ocnophila having been estabUshed as Integra 

 Brunner, in the present paper/ "^ we would note that probably the 

 best linear arrangement of this group of genera is as follows: 

 Libethra, Libethroidea, Ocnophila, Litosermyle and Sermyle. 



The present female would appear to differ from that sex of 

 Ocnophila Integra Brunner, genotype, in the more elongate head; 

 elongate, not quadrate, ninth (ultimate) dorsal abdominal seg- 

 ment, and elongate operculum, with ventral surface of equal 

 width to the truncate apex, not sublanceolate. 



Genotype. — Litosermyle ocanae new species. 



Generic Description. — All diagnostic characters, except the fol- 

 lowing, as given on page 170 for Libethroidea. ^^^ Ninth (distal) 

 dorsal abdominal segment of female^*^' elongate, not narrowing, 

 truncate distad. Operculum of female with width of ventral sur- 

 face subequal to that of its truncate apex, very elongate but 

 leaving the ovipositor valves exposed. Cerci of female exposed 

 from below. Genicular lobes of median and caudal femora acute 

 produced, more so than in any species at hand of Libethra or 

 Libethroidea, not as much produced but more acute than in the 

 species of Sermyle before us. 

 Litosermyle ocanae new species (Plate XXIII, figs. 9 and 10.) 



This somber and plain walking stick exhibits a type of female 

 genitalia widely different from that of any previously described 

 form. In Brunner's key for Ocnophila the species would run to 

 the genotype, Integra Brunner, the differences discussed above 

 obliging us to separate ocanae as generically distinct. 



Type. — 9 ; Pueblo Nuevo de Ocafia, Santander, Colombia. 

 September 3, 1916. (M. A. Carriker Jr.) [Hebard Collection, 

 Type No. 470.] 



Size medium; form moderately slender as compared with species of Libdhra, 

 medium as compared with species of Sermyle. Antennae simple, moderately 

 elongate, reaching to base of third dorsal abdominal segment. Head elongate, 

 occiput smooth but with six longitudinal rows of minute, bhmt, irregularly 



"'o See page 163. 



"" The species of the group of allied genera of the Heteroneminae, to whicii 

 this genus belongs, show almost exclusively the characters of generic value in 

 the distal abdominal segments and genitalia. This is in i)art due to the fact that 

 differences in length of antennae, and simple or variously specialized i)rocesses 

 or armament of body segments and limbs, constitute most striking features to 

 distinguish the species, but are plainly valueless for generic criteria. 



'"2 The male .sex is unknown. 



