OLIXON.— ALYSIA. 413 



l. Olixon testaceum. (Tab. XVI. fig. 21, $ *.) 



Testaceum, apice abdominis segmento 2° nigro, coxis antennisque flavis. § . 

 Long. 5 millim. 



Hab. Panama, Bugaba (Champion). 



Shining, almost glabrous, the apical segments of the abdomen with a short white pile ; 

 mesothorax finely and obscurely punctured. 



Division EXODONTI. 



ALYSIA. 



Alysia, Latreille, Hist. Nat. Gen. Crust, et Ins. xiii. p. 177 (1805). 



The majority of the " genera " into which Alysia has been divided by Forster appear 

 to me to be untenable, being founded on what I take to be mere specific distinctions. 



A. Anal nervure issuing from the lower part of the posterior diseoidal cellule and 

 acutely angled at the base, the lower (and longer) division of it not being on a level 

 with the prmbrachial nervure. Second cubital cellule more than twice as long as 

 wide, of nearly equal width throughout. Badial nervure issuing not far from the 

 middle of the stigma. Transverse humeral nervure interstitial or nearly so. 

 Petiole narrow at the base, dilated towards the apex. Antennae sometimes over 

 100-y'ointed, more than twice the length of the body. 



v 



1. Alysia pulchripennis. (Tab. XVI. fig. 24, <s .) 



Nigra, abdominis segmentis l°-4 m pedibusque ruf o-testaceis, tibiis tarsisque posticis nigris, mandibulis palpisque 



flavis ; alis flavo-nyalinis, fusco bifasciatis ; tegulis flavis. tf • 

 Long, fere 9 millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



Antenna? more than twice the length of the body, 103-jointed, covered with a micro- 

 scopic pile, the third joint longer than the fourth. Fa^e semiopaque, finely punctured, 

 a shining, narrow line down the centre ; covered with longish silvery-white hair. Meso- 

 thorax with a few scattered hairs ; metathorax covered with long grey hair ; a stout 

 keel down the centre of the metanotum. Petiole not much shorter than the second 

 segment, with a tubercle on either side before the middle ; the apex of the abdomen 

 acute. Wings : the recurrent nervure received a little beyond the first transverse cubital 

 nervure ; in the second cubital cellule the pobrachial transverse nervure is interstitial. 



^- 2. Alysia xanthoptera. (Tab. XVI. fig. 23, <j .) 



Ferruginea, antennis, capite, femoribus, tibiis tarsisque posticis nigris ; alis flavo-hyalinis, apice fumatis. c? . 

 Long. 7 millim. 



Hab. Panama, Volcan de Chiriqui 2500 to 4000 feet (Champion). 



* Our artist has omitted to indicate the greatly abbreviated wings ; and the specimen figured is erroneously 

 stated to be a male on tbe Plate. 



