1925] Guests of Eciton hamatum Collected by Prof. Wheeler 171 
marginal) formed by double rows of coarse, approximate punc- 
tures, the sutural straight, the second nearly straight and 
terminating at two-thirds the distance from posterior to anterior 
border, the third parallel to the second and a little longer, the 
others extending to near apical border of elytra and terminating 
in a punctate area; surface between striae glabrous. Propygidium 
and upper portion of pygidium coarsely and shallowly punctate. 
Prosternum margined at sides, margins converging in front, 
surface flat and nearly smooth, three times as long as broad; 
anterior lobe and the pro pleurae coarsely rugosely punctate. 
Mesosternum triangularly projected in front and finely punctate, 
with a marginal and submarginal line at sides, the latter strongly 
bent in front; surface with a nearly obsolete carina at middle, 
sparsely punctate anteriorly and coarsely, confluently punctate 
at sides between marginal lines and at corners of posterior border. 
Mesosternum with a basal row of eleven large punctures and a 
few fine scattered punctures. Lower face of anterior femora 
and tibiae rugosely punctate similar to the propleurae. Posterior 
tibiae not broader than the femora, the outer border broadly 
rounding into the base; anterior tibiae with a series of nine long 
separated spiniform teeth. 
Type locality. — Barro Colorado Island, Panama 
(August 1, 1924.) 
Host. — Eciton hamatum (Fab.) 
Described from one specimen. 
Synodites schmidti Lewis, from Bahia, is, judging from the 
description, close to bifurcatus, but has the fourth elytral striae 
joined at base to the sutural (in bifurcatus they are separate); 
there is a short, curved stria between the prosternal carina and 
the coxae, the mesosternum is not carinate at middle, carinae 
at sides of head converge in front to form an angle, and no 
mention is made of the strongly bifurcate setae. Both species 
are very similar in punctation (with “tear-shaped” punctures 
abundant on the pronotum), in striation and in the structure 
of the pro-and mesosterna. 
