166 HYMENOPTEBA. 



which the scutellum is narrowed. Mesonotum strongly punctured, the middle transversely 

 striated ; areae obsolete ; the apex but very slightly hollowed in the middle. Petiole 

 smooth, shining; postpetiole punctured, longitudinally striated. Gastrocceli small, 

 yellow. Abdominal segments longitudinally punctured. 



63. Ichneumon opiniosus. (Tab. VIII. fig. 11.) 



Flavns ; pronoto (linea laterali excepta) mesonoto maculisque 2 metanoti nigris ; pedibus fulvo-testaceis, femori- 



bus supra nigro-lineatis ; alis hyalinis, stigmate testaceo. § . 

 Long. 18 millim. 



Edb. Mexico, Valladolid in Yucatan (Gaumer). 



Antennae porrected, pilose ; basal joints of the flagellum longer than broad, the 

 apical joint broader than long, semidentate. Head punctured, the vertex and hinder 

 part black; clypeal foveae distinct; the clypeus projecting out from the front at 

 the base and forming a semicircular ridge uniting the fovese, the apex a little pro- 

 jecting. Thorax punctured; prosternum, a line on the pronotum, tegulae, two short 

 lines on the middle of the mesonotum, scutellum, the suture of mesonotum, post- 

 scutellum, pleurae (except a curved line below the wings), and sternum, yellow. Meta- 

 notum yellow, except two broad lateral marks, issuing from the base, and a mark in the 

 centre, black. Scutellum with the sides and apex rather abrupt, the top flattish, 

 punctured, but not closely. The apex of the metanotum is not much hollowed and 

 is somewhat abrupt; tubercles distinct. Petiole smooth, shining, postpetiole punc- 

 tured ; the rest of abdomen closely punctured. Gastrocceli longer than broad, striated. 



64. Ichneumon trunculentus. (Tab. VIII. fig. 12.) 



Long. 18 millim. 



Hab. Guatemala, San Geronimo (Champion). 



In coloration nearly identical with I. opiniosus, but wanting the two yellow marks 

 in the middle of the mesonotum, and having instead one at the side of the tegulae ; the 

 antennae shorter ; the scutellum and the base of the metanotum impunctate ; the basal 

 segments longer and narrower ; the apex of the metathorax not hollowed at the sides, &c. 



Antennae porrected, pilose. Head behind and on the vertex black ; clypeal foveae 

 deep ; face rather flat, obsoletely punctured. Thorax smooth, shining, almost impunc- 

 tate, densely pilose. Prosternum, a line on the pronotum, the tegulae and a broad mark 

 at their side, the scutellum, postscutellum, sternum, pleurae, and metanotum (except 

 two large marks at the base), yellow. Scutellum with the sides abrupt, keeled; 

 narrowed behind, longer than broad. Metathoracic areae obsolete at the base, which 

 is smooth, impunctate, and shining ; the rest obscurely reticulated ; the apex is not 

 hollow and has a semi-perpendicular slope. Petiole smooth, shining, impunctate. 

 Postpetiole black, except at the apex ; the sides punctured. Gastrocceli shallow, longer 

 than broad, impunctate. The abdominal segments punctured, except at the apex; 

 black, except at the apex and beneath. 



