106 HYMENOPTEEA. 



flagellum, and curved. The flagellum is not much longer than the head in front, 

 thick, becoming gradually thicker towards the apex, which is acute and compressed at 

 the side; the fourth, fifth, and sixth joints are subequal, and a little longer than the 

 succeeding. The face between and below the antennae is distinctly keeled. Head, 

 pronotum, and mesonotum covered with large and deep punctures, which are distinctly 

 separated ; the basal two thirds of the scutellum is covered with similar punctures, but 

 more widely separated ; the apical third is very finely and minutely punctured. 

 Metanotum finely punctured. Pleurae smooth, shining, the edges with scattered punc- 

 tures. The coxae are closely punctured, much stronger than the apex of scutellum. 

 Abdomen smooth, shining, impunctate. The posterior femora are thickened, about 

 one third longer than broad ; the middle beneath has a large oval indentation, the 

 edges of which are very slightly acute, giving the appearance of being toothed. The 

 tibiae are thick, especially towards the apex, and curved. The long spur of the thick 

 calcaria is nearly as long as the metatarsus, which is not much longer than the second 

 joint. The tibiae are fuscous on the outer side. 



2. Diomorus mayri. (Tab. IV. figg. 17, $ ; 17 «, b, trophi.) 



Viridis ; scapo antennarum, tegulis, geniculis tibiisque testaceis ; tarsis albidis, antennis nigris, terebra quam 



corpus longiore ; alis hyalinis ; thorace dense punctata ; c? tibiis posticis fuseis, basi et apice testaceis. 

 Long. 4-5 millim., terebra 5-6 millim. 



Hab. Guatemala, San Geronimo [Champion). 



The face is coppery-tinted, and covered with a scattered longish white silvery hair. 

 The scape reaches to the ocelli, which are placed in a curved line. The annellus is 

 longer than broad, the apex scarcely transverse; the third joint is a little longer and 

 thinner than the fourth, the others very slightly shorter, the last conical. Head 

 coarsely punctured, except the front in the middle below the ocelli, which is very finely 

 punctured and coppery-tinted. Thorax covered with large, deep, distinctly separated 

 punctures. Apical third of the scutellum very finely punctured, the basal part punc- 

 tured like the mesonotum, the two kinds of punctuation being separated by a transverse 

 line. The middle of the pleurae is smooth, shining, and impunctate ; the rest and the 

 breast finely punctured. The metanotum is smooth, shining, impunctate. The abdomen 

 is compressed, oblong, shining, impunctate, the last segments coppery. 



The coxae and femora are minutely punctured ; posterior femora moderately thick, 

 and with an indistinct tooth at the apical third. The calcaria is short, not one fourth 

 of the length of the metatarsus. Wings clear hyaline; the costae glabrous. The male 

 has the antennae thicker. 



Bred by Mr. Champion from the galls of Cyni/ps guatemalensis. 



