F. C. BOWDITCfT 491 



hind tibiae and tarsi wholly, and the middle partly, yellow, elytra 

 obsoletely on each edge about the middle and joints nine to eleven 

 of the antennae fulvous, elytra dull with microscopic pubescence, 

 only visibly punctate striate obsoletely at the base. 



Type. — Cachabe, Ecuador; low c; XII, 1896, (Rosenberg). 

 Length 6 mm. 



Clypeus with acute meilian carina, braiu^hins between the antennae into 

 two shiny obHque knobs, vertt>x and neck finely strigose; thorax elongate, 

 constricted in front so that the anterior angles are sub-prominent, sides 

 margined, hardly subangulatc before the middle, surface with a longitudinal 

 median depression which is broad and well marked in front, obsolete behind, 

 also an oblic|ue depression on either side near the base, surface sparsely punc- 

 tulate; scutel and elytral dull black, in certain light, traces of punctures 

 arranged in striae can be seen at the base, but only with a strong glass can 

 anything approaching striae be made out on the rest of the elj'tra, and then 

 it takes a good imagination. The lateral edge is sharp and marked with a 

 line of punctures; a needle point will make marks on the surface similar to a 

 finger removing the bloom from a plum. Body beneath shining black, legs 

 including the coxae and hind trochanters yellow, the anterior pair having the 

 apex of the femora, tibia and tarsi black, the middle pair having the same parts 

 dark but more or less rufous, and the hind pair having the apex of femora 

 inky black; claws simple, hind tibia with a single excurved spine. 



A very aberrant form; one of the characteristics of the group 

 is punctate striate eh^tra and it is only by courtesy that this can 

 be so called, otherwise it seems to fit fairly well; it has a general 

 resemblance to fasciaticoUis Jac. from Costa Rica. 



One example. 



Tetragonotes sericeus nov. sjx 



Elongate, rufous; palpi, antennae except the last joint, the 

 back part of the head and the scutellum black, body beneath and 

 tarsi more or less dark rufous, the thorax and elytra clothed with 

 very short golden pubescence. 



Type. — Chaco, Bolivia (square green label). Length G mm. 



Head with broad smooth clypeus, well carinated in the middle, frontal 

 tubercles strong, smooth, rufous, the color extentling in a smooth band to the 

 eye, vertex and neck finely punctulate; antennae filiform reaching a little 

 below the middle of the elytra, the seventh joint obviously dilated (a sex sign 

 as in Allochroma?) last four joints shortened, the eleventh pale flavous; the 

 thorax with the side angulation and anterior angles of Tetragonotes and the 

 anterior compression of Rhinotmetus, a well marked median line, nearly the 

 whole length, disk flattened anteriorly and with the rather obsolete fovea on 

 either side just back of the middle, all the angles dist inct ; elyt ra with punctures 



TRANS. AM. ENT. SOC, XLI. 



