150 HYMENOPTEKA. 



The antennae, flattened and dilated at the apex, remind one of Joppa, but in other 

 respects this species agrees best with the genus Ichneumon. 



31. Ichneumon carinifrons. 



Ferrugineus ; antennarum annulo facieque flavis ; flagello antennarum (annulo excepto), abdominis segmentis 2°- 

 4 m basi, tarsis posticis tibiarumque apice nigris ; alis fusco-hyalinis, nervis fuscis, stigmate sordide rufo. $ . 

 Long. 15 millim. 



Hab. Mexico (BilimeJc) ; Panama, Volcan de Chiriqui (Champion, d %). 



Antennae as long as the abdomen and half of the thorax, thickened a little beyond 

 the middle, but narrowed again towards the apex, semiconvoluted ; the base reddish. 

 Head punctured, not buccated ; the face with a broad keel down the centre, the keel 

 becoming broader towards the apex. Palpi reddish. Mesonotum closely and coarsely 

 punctured. Scutellum not projecting much above the mesonotum, but raised a good 

 deal higher than the postscutellum ; laterally it is raised considerably above, and 

 clearly separated from the mesonotum ; its sides are distinctly keeled throughout, 

 the keels projecting over the sides ; it is strongly punctured. Pleurae less strongly 

 punctured than the mesonotum. Metathorax broad above, with an abrupt slope 

 at the apex, which has a strong blunt tooth on each side ; areae obsolete. Petiole 

 smooth, shining, hollow in the centre above, the sides carinate ; postpetiole strongly 

 punctured on its apical half. Abdomen closely and strongly punctured all over above, 

 longer than the head and thorax together. Gastrocceli distinct, deep, broader than 

 long. Areolet 4-angled, the lateral nervures joined above. 



This species comes very near to /. sycophantus, but is smaller ; the latter has not 

 the areolet triangular above, its wings have a violaceous tinge, and are more uniformly 

 fuscous [the fuscous tinge in I. carinifrons being only noticeable at the stigma] ; the 

 keel on the face is not so clearly defined ; the scutellum is shorter, and has not such 

 an abrupt slope at the apex ; the metathoracic areae are distinct, and the whole, not the 

 apex only as in /. carinifrons, of the postpetiole is punctured. 



What appears to be the male (from the Volcan de Chiriqui) has the antennae black, 

 except the scape ; the suture separating the meta- from the mesonotum is black ; the 

 black bands on the abdomen are broader ; and the stigma is much darker, especially at 

 the apex. It may, however, be the male of another species. 



32. Ichneumon celatus. (Tab. VII. fig. 13.) 



Ferrugineus ; facie scutelloque flavis ; abdominis segmentis 3°-5 m cingulo basali, linea pleurali, coxis posticis 

 subtus, femorum posticorum apice tibiarumque posticarum apice nigris; antennis nigris, basi et medio 

 pallide rufis ; alis byalinis, stigmate testaceo. 



Long. 13 millim. 



Hab. Mexico, Northern Sonora (Morrison). 



Head and thorax rather strongly punctured ; scutellum shining, obsoletely punc- 

 tured, large, broader than long, slightly elevated. Metathoracic areae not very clearly 



