240 HYMENOPTEKA. 



A. The basal segment of the abdomen not carinate. (Species 1-9.) 

 i. Fore wings with two transverse cubital nervures. (Species 1-8.) 



l. Tiphia elegans. (Tab. XII. fig. 16.) 



Nigra, nitida, sparse punctata ; alis flavis. $ et S • 

 Long. 18 millim. 



Eab. Mexico, Omilteme 8000 feet, Chilpancingo 4600 feet, both in Guerrero 

 (H. H. Smith). 



Head shining, very sparsely covered with long fuscous hairs ; bearing on all parts 

 large, widely separated punctures, which become smaller and less numerous behind the 

 ocelli ; clypeus finely punctured and fringed with long fulvous hair ; the apical three- 

 fourths of the mandibles piceous. The scape of the antennae sparsely punctured, and 

 fringed with long fulvous hair; the flagellum stout, densely covered with a microscopic 

 fulvous pile and at the base with some hairs; the third and fourth joints subequal. 

 The pronotum bearing some long pale fulvous hairs ; the apex impunctate, the other 

 parts (except the vertical base) with distinctly separated punctures ; the base impunctate 

 and with a distinct border ; the propleurae, except at the top, obliquely striated. The 

 mesonotum shining, very sparsely haired, the base impunctate, the sides with a few large 

 punctures ; the centre depressed, closely punctured, a deep furrow at the sides. The 

 scutellum with scattered punctures, the middle impunctate. The median segment 

 shagreened; the central line thicker than the two lateral lines, and dilated towards the 

 apex, the lateral lines curved at the base ; at the sides there are two keels running to 

 the spiracles ; the apex is sharply oblique. The mesopleurae are punctured ; the meta- 

 pleurae above strongly, obliquely punctured. The breast is covered with long white 

 hair. The abdomen is shining ; the second segment at the base crenulated ; the third 

 to the fifth segments obscurely punctured at the apex and fringed with long pale hair, 

 which becomes longer towards the apex ; the pygidium at the base irregularly rugose, 

 the apex rufous, the base covered with pale hair ; the ventral segments punctured at 

 the apex and fringed with pale hair. Legs : the femora and coxae sparsely covered 

 with long white hair, the tibiae and tarsi more densely clothed with shorter pale silvery 

 hair ; the tarsal spines and the claws rufous ; the calcaria dull rufous ; the coxae punc- 

 tured. The first recurrent nervure is received in the middle, the second in the apical 

 fourth of the cellule. 



The male is similarly coloured to the female. It has the head much more strongly 

 and coarsely punctured ; the oral region more densely covered with long white hair ; 

 the clypeus projecting squarely in the middle, where it is transverse, and strongly 

 punctured ; the antennae as long as the thorax, thick, the scape closely punctured and 

 covered with long white hair ; the flagellum bearing a very fine microscopic pile, the third 

 and fourth joints subequal ; the punctuation on the pronotum extending quite close to 



