MORGAN HEBARD ' 353 



Type. — 9 ; Carrillo, Costa Rica. [Hel)ard Collection, Type no. 

 869.] 



Size rather small and form more slender than i.s usual in this genus of very 

 broad species. Head flattened, the occiput with small scattered tubercles 

 and two postocular rows of the same on each side (these not large and not 

 forming small denticulations as in this sex of P. berosus Westwood) . Fronotum 

 polished but rugulose, slightly wider than long. Mesonotum with surface 

 similar, shorter than pronotum, transverse but decidedly less so than in bero- 

 sus. Tegmina large, extending as far caudad as caudal margin of fifth tergite, 

 veins proximad forming a number of small smooth tubercles, shoulder with a 

 low rounded lamella, apices broadly rounded. Wings fully developed, ex- 

 tending to ajiex of abdomen. Abdomen with dorsal surface tul)erculate 

 meso-laterad and distad; fourth tergite minutely and roundly lamellate pro- 

 duced latero-caudad, fifth, sixth-and seventh tergites increasingly and much 

 more decidedly so, eighth and ninth tergites with lateral portions lamellate 

 and rounded produced but decreasingly so. Cerci straight, flattened cylin- 

 drical. Ventral surface strongly concave. Femora very strongly lamellate 

 and hairy; their external surfaces weakly tuberculate; their ventro-external 

 margins with very large waves, well separated and blunt but shaped like the 

 teeth of a saw, these decided on the cephalic femora, subobsolete (or weak in 

 paratype) on the median femora and very decided on the caudal femora, there 

 six in niunber. Dorso-external margins of cephalic femora strongly lamellate 

 and convex in distal half, of median femora straight and subdenticulate (or 

 with three small denticulations), and of caudal femora straight with three 

 blunt denticulations. Tibiae lamellate and hairy; external surfaces similarly 

 tuberculate; the margins of the cephalic and median straight (or of median 

 with two low undulations of the dorsal margin), of the caudal tibiae with 

 ventral margin showing four large lamellate and rounded waves. Subgenital 

 plate produced caudad in median section, the lateral margins in thi^ portion 

 Very weakly convergent to the transverse and very feebly convex distal margin. 



Allotype. — cf ; Alhajuela, Panama. A]iril 17, 1<)1I. (A. 

 Busck.) [United States National Museum.] 



Very similar to female but smaller and less robust. Tegmina similar except 

 that they are produced in a sharp acute-angulate lamcUation at the shoulders 

 and extend to the caudal margin of the fourth tergite. Lateral lamellation of 

 distal tergites similar but much weaker. Limbs similar.^^ Subgenital plate 

 with lateral margin converging, then rounding into the obtuse-angulate 

 emarginate distal margin, so that the plate appears almost bilobate. 



General coloration brown, limbs weakly mottled. Tegmina and exposed 

 portion of wings, when at rest, lichenose, blotched with gray-green, grayish 

 white and brown, the proximal tubercles on the tegmina honey yellow, in the 



^' In such lichenose or bark-like insects, variation is probably greater than 

 is usual in the Phasmidae. In the present male the sinistral caudal tibiae 

 has its ventro-external margin only undulate, though the corresponding margin 

 of the dextral limb is as described for the type. 



TRANS. AM. ENT. SOC, XLVHI. 



