294 HYMENOPTEKA. 



gradual curve from the base to the apex, the extreme apex curved upwards ; the 

 angle formed at the apex of the first cubital cellule shorter on the upper than on the 

 lower side. 



11. Ophion chiriqnensis. (Tab. XII. fig. 20.) 



Luteus, capite, scutello pleurisque, flavis ; alis hyalinis, stigmate luteo. $ . 

 Long. 23 millim. 



Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 



Smaller than O. curvinervis, and identical with it in sculpture (including the form of 

 the metathorax), and in coloration, except that the antennae are entirely luteous ; 

 differing from it otherwise in its smaller size, in the second abdominal segment being 

 stouter and not so much compressed laterally compared to the first ; in the basal division 

 of the radial nervure not being curved upwards, and in the upper angles of the apex of 

 the first cubital cellule being longer than the lower. 



B. Inner discoidal cellule not much longer than high ; scutellum not clearly heeled. 



a. Inner discoidal cellule angled at the inner upper margin; the recurrent nervure 



emitting a branch ; stigma luteous. 



12. Ophion flavo-orbitalis. (Tab. XII. fig. 16.) 



Luteus, orbitis scutelloque flavis ; alis hyalinis, stigmate luteo. $ . 

 Long. 21-22 millim. 



Hab. Mexico, Cordova (Hoge) ; Panama, Volcan de Chiriqui 2500 to 4000 feet 

 (Champion). 



Face broadly projecting, finely punctured. Thorax finely punctured ; scutellum with 

 the sides carinate ; metanotum aciculate, with two sharp transverse keels, the space 

 between them hollowed ; a longitudinal keel on either side of these, and two keels run 

 down the middle from the posterior transverse one, forming a longish area. First 

 abdominal segment dilated at the apex, the dilation gradual from the middle ; the sides 

 keeled ; second segment thicker, and distinctly shorter than the first. 



13. Ophion ancyloneura. (Tab. XII. fig. 17.) 



Flavus ; antennis, abdomine, femoribus tibiisque, luteis ; alis byalinis, stigmate testaceo. $ . 

 Long. 17 millim. 



Hab. Guatemala, Capetillo (Champion). 



Antennae a little longer than the body, pilose ; third joint shorter than the fourth and 

 fifth together. Head closely punctured ; clypeal fovese large, deep, longer than broad ; 

 face broadly projecting in the middle ; a longish tubercle below the antennae ; tips of 

 the • mandibles piceous-black. Thorax almost impunctate, shining; mesonotum with 



