Cohoptera from Costa Rica. 119 



Oncideres Pittxeri, sp. n. 



0. amputatori affinis ; prothorace utrinque pone medium tuberculo 

 nigro-nitido vix elevato, supra maculis tribus nigro-nitidis in 

 serie transverso ante medium positis ; elytris fulvo-maculatis, 

 utrinque plaga magna elongata suj^ra dilacerata, alba, basi dense 

 nigro-nitido-granulatis, disco fere usque medium minus dense sed 

 evidenter granulatis ; corpore subtus, praecipue versus latera, 

 prothoracisque lateribus albescentibus ; segmentis abdominis 

 postice fulvis. $ . 



Long. 23, lat. 8| mm. 



Hab. Costa Eica, savannahs and forests of Limon, facing 

 the Pacific {R. Pittier). 



From 0. amputator, Fabr,, 0. putator^ Thorns., and other 

 allied forms this species is to be distinguished by the some- 

 what larger and more closely placed shining granules on the 

 base of the elytra and by the extension of these granules on 

 the dorsal region almost up to the middle. The long white 

 patch on the side of each elytron is also characteristic ; this 

 reaches the margin of the elytron on its outer side, while its 

 inner border is very irregular and is broken by one large gap, 

 which divides the patch into a larger anterior and a smaller 

 posterior portion ; near its anterior end, which lies a little 

 behind the shoulder, a few isolated black granules are to be 

 seen. The pubescence on the underside of the body is greyish 

 white, distinctly white and rather dense on the sides of the 

 prothorax and mid and hind breast. The abdominal segments 

 are fulvous towards their hind borders. 



Amjphionyclia ventralis, sp. n. 



Capite testaceo, flavo-pubescente ; prothorace albo-pubescente, supra 

 prope basin infuscatis ; elytris nigris, dense punctatis, griseo 

 tenuiter pubescentibus, utrinque carinatis ; corpore subtus nigro- 

 fuscis et testaceis, segmentis duobus ultimis abdominis dense 

 iiavo-pubescentibus, coxis femoribusque pallide testaceis, tibiis 

 tarsisque fuscis ; antennis subtus sparse ciliatis, articulis quarto, 

 quinto et sexti basi testaceis. 



Long. 11, lat. "dk mm. 



Hah. Costa Rica, Pacific side, between Mata de lana and 

 Eodeo (//. Pittier). 



Head testaceous, with a dense yellowish pubescence above. 

 Prothorax with the basal margin turned slightly outwards, 

 with a dense whitish pubescence, except near the base on the 

 upper surface, where it is somewhat blackish. Elytra black, 

 with a thinner dark grey pubescence, which does not entirely 



