258 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



long, chiefly the metatarsus which is brown with yellow base. Pos- 

 terior femora rather short and thick at base, with almost null fihform 

 apical part; external face obhquely striated with brown. Posterior 

 tibiae presenting foiu- brown rings, armed with four external, three 

 internal spines which are short and placed quite in the apical part; 

 margins strongly serrulated; external apical spurs very short, median 

 and superior internal spurs longer, chiefly the median, which, however, 

 does not exceed one-third the metatarsus; the latter is long, brown 

 with yellow base, armed above with a row of five or six denticles, the 

 apical spiu"s short. 



El3-tra extending to the apex of abdomen, rounded at apex; mirror 

 very large, occupying more than two-thirds of the length of the 

 elytron, divided by 13 undilated veins; diagonal vein very short; 

 1st chord rather long, almost straight and almost touching the mirror; 

 2nd chord short, strongly curved; anal field very short, the archet 

 unbroken, simply undulated; obHque veins very close, about 12 in 

 number (description made from the left elytron, the right one being 

 absent), apical field very short with one vein only; lateral field dark 

 brown, Sc plain. 



Length 12.0 mm.; pronotum 2.8 nmi.; posterior femm* 11.0 mm.; 

 elytra 7.0 nam. 



Remarks: Very close to A. multivenosa Chopard, from Costa Rica, 

 but smaller with larger elytra and mirror occupying a more important 

 place. 



Genus Aclodes Hebard, 1928 



Aclodes niaculatum (Caudell) 



Endacusla maculata Caudell, Ins. Insc. Menstr., vol. 6, p. 66, 1918. 



Specimens examined: Peru: Pucallpa, Jan. 22, 1948 (Icf), 

 Schunke; Tingo Maria, December 1949 (IcT), Allard. 



Family Oecanthidae 

 Key to the American genera 



Posterior tibiae serrulated and armed with small spines on the superior margins. 



Oecanthus Serville 

 Posterior tibiae serrulated without spines Neoxabea Kirby 



Genus Oecanthus Serville, 1831 

 Oecanthus peruvianas Walker 



Oecanthus peruvianua Walker, Catalogue of the . . . Dermaptera Saltatoria . . . 

 in the British Museum, vol. 1, p. 95, 1869. 



Specimens examined: Peru: Chanchamayo, La Merced, Feb. 2, 

 1949 (19), Schunke. 



