112 COLOMBIAN DERMAPTERA AND ORTHOPTERA 



Old Panama, Panama, XI, 13, 1913, (M. Hebard; under drift, on edge of 

 coral sand beach), 1 small juv. 9 , [Hebard Cln.]. 



Taboga Island, Panama, II, 23, 1912, (A. Busck), 1 large juv. d', [U. S. 

 N. M.]. 



Tabogilla Island, Panama, II, 16, 1912, (A. Busck), 1 large juv. cf , 1 medium 

 juv. d", 2 large juv. 9 , [U. S. N. M.]. 



Cincinnati, Sierra Nevada de Santa Maria, Magdalena, Colombia, 4000 to 

 5000 feet, VII, 10 and 14, 1914, (M. A. Carriker Jr.), Icf, 2 9, type, allotype, 

 paratype, 1 very large juv. cf, [Hebard Cln.]. 



Venezuela, 1 9 , [A. N. S. P.]. 



A Note on Eurycotis and Pelmatosilpha 



The genera Eurycotis and Pelmatosilpha have been dogmatically 

 separated by features of tegminal length; species with abruptly 

 truncate or lateral tegmina being referred to Eurycotis, those with 

 less decidedly reduced or fully developed tegmina to Pelmatosil- 

 pha. 



From study of the considerable series at hand, representing 

 numerous species of both genera, we would distinguish between 

 them as follows: 



A. Dorsal surface of insect less convex. Tegmina transversely truncate, 

 or more decidedly reduced, lateral. (The dark species have dorsal surface 

 and tegmina roughened. Many species of pale coloration represented with 

 differently striking color patterns.) Eurycotis St&l 



AA. Dorsal surface of insect more convex. Tegmina truncate but obhquely 

 so, with distal angle at sutural margin the more produced, or fully developed. 

 (All are dark species with dorsal surface including tegmina poHshed and fre- 

 quently showing a purplish sheen. Some of the species have pronotum and 

 tegmina conspicuously margined with yellow.) Pelmatosilpha Dohrn 



It is evident from the description that Eurycotis cothurnata 

 Giglio-Tos must be assigned to Pelmatosilpha, as is possibly true 

 for Eurycotis suhalata Saussure and Zehntner, the description of 

 the tegmina of the latter species leaving considerable doubt as 

 to their actual form. From material at hand from Trinidad we 

 are also able to assign Pelmatosilpha decipiens Kirby to Eurycotis. 

 That author has badly confused these genera and their estab- 

 lished synonymy. ^^ 

 Pelmatosilpha micra new species (Plate XVIII, fig. 2.) 



The present species is evidently closely related to P. villana 

 Saussure and Zehntner and P. cothurnata (GigUo-Tos). It differs 

 from both in the smaller size, particularly indicated by the 



2»Synon. Cat. Orth., i, pp. 142 to 144, (1904). Sec Hebard, Mem. Am. 

 Ent. Soc, No. 2, pp. l(i.'5 and 166, (1917). 



