PAEAMESIUS. 439 



B. Postscutellum pyramidal ; second joint of the antennae scarcely half the length of 

 the third ; vertex not separated by furrows from the sides. 



3. Paramesius canaliculars. (Tab. XVIII. fig. 24, $ .) 



Niger, flagello, antennarum basi pedibusque rufo-piceis ; alis fumatis, apice fere hyalinis. $ . 

 Long. 4^ millim. 



Hab. Mexico (Salle). 



Antennae with the second joint one half shorter than the third, the fifth one fourth 

 shorter than the fourth, and the sixth thicker and shorter than the fifth ; the seventh 

 and eighth joints globular, as broad as long ; the remaining joints (forming the club) 

 much wider, broader than long, the last joint bluntly conical, and narrower and a very 

 little shorter than the twelfth. Head with a few long scattered black hairs; the woolly 

 hair on the collar moderately thick, griseous. Fovese at the base of the scutellum 

 large, longer than broad, finely punctured. Postscutellum pyramidal. Petiole three 

 times as long as broad, deeply and widely channelled in the middle ; the sides and 

 lower surface covered with woolly hair. The wings are subhyaline beyond the stigma, 

 this hyaline portion forming an elongated fascia close to the border, but clearly sepa- 

 rated from the hyaline part at the apex ; the stigma scarcely projects downwards from 

 the costa. 



C. Postscutellum pyramidal, but not so much elevated in the centre ; the second joint 

 of the antennae as long as the third ; vertex not separated by furrows from 

 the sides. 



4. Paramesius chiriquensis. (Tab. XVIII. fig. 15, ? .) 



Niger, nitidus, geniculis tarsisque piceis ; alis fere fumatis, nervis fuscis. $ . 

 Long, fere 4| millim. 



Hab. Panama, Volcan de Chiriqui 8000 feet (Champion). 



Antennae scarcely so long as the thorax and abdomen united ; sparsely clothed with 

 hair, the basal joint more distinctly so ; the latter as long as the following three joints 

 united; the second joint nearly as long as the third, which is about one third longer 

 than the fourth ; the eighth to the twelfth joints broader than long, and gradually 

 becoming broader outwardly ; the thirteenth twice as long as the twelfth and conical at 

 the apex. Head and thorax with scattered hairs ; parapsidal furrows complete ; three 

 foveee at the base of the scutellum ; postscutellum pyramidal ; metanotum irregularly 

 and roughly reticulated. Petiole nearly three times longer than broad, with two stout 

 keels down the centre and one on either side ; the base of the first segment with 

 three grooves, the central groove the longest. Tibiae covered with stiff" white hairs. 



