246 HYMENOPTEEA. 



punctured, sparsely haired ; the metapleurae strongly striolate. The first segment of 

 the abdomen at the base semiperpendicular, at the top carinate ; the segments punc- 

 tured more densely towards the apex, and fringed with pale fulvous hair ; the pygidium 

 coarsely punctured, the edges fringed with pale fulvous hair; the ventral surface 

 rather strongly punctured, the segments fringed with pale fulvous hair. The tibiae and 

 tarsi covered with silvery hair ; the femora stout, dilated, punctured in front and with 

 pale hairs, behind shining, glabrous ; the fore tarsi short, thick, the spines reddish, 

 the base of the metatarsus incised ; the long spur of the fore tibiae cleft at -the apex. 

 The second cubital cellule at the top longer than the first ; the first recurrent nervure 

 sinuate, received shortly beyond the middle, the second nearly in the middle of the 

 cellule. 



The form of the first abdominal segment is quite as in Epomidiopteron, and the 

 species may really belong to that genus ; but, on the other hand, the male has not the 

 clypeus white, nor the third cubital cellule narrowed towards the radial and pointed 

 towards the apex; nor in either sex is the enclosed space on the median segment 

 triangular. 



The male has the head and thorax more pilose ; the clypeus projecting in the middle 

 and fringed with long white hair ; the smooth space on the apex of the pronotum 

 much smaller ; the mesonotum uniformly punctured throughout ; the punctuation of 

 the abdomen not so close ; the hair on the apices of the segments much sparser ; the 

 first segment longer than broad, narrow at the base, dilated and raised at the apex ; 

 the second segment with a deep crenulated suture at the base ; the femora not 

 dilated ; the tibiae and tarsi, and the femora to a less extent, covered with white hair ; 

 the hind tibiae with the edges serrulate ; the fore tarsi incised at the base (as in the 

 female) ; and the calcaria bifid at the apex. The wings are as in the female ; the 

 second transverse cubital nervure is faint, almost obliterated in the middle ; the stigma 

 is black. 



T. carinata may be known from T. trichiosoma by the body not being densely pilose ; 

 the pygidium coarsely punctured throughout ; the metatarsus, instead of having only 

 two lorigish ferruginous spines, has, apart from the apical one, four shorter, thicker 

 black ones ; the second recurrent nervure received in the middle of the cellule ; the 

 fore metatarsus incised ; and the first abdominal segment keeled at the top. 



11. Tiphia rugosa. 



Long, fere 15 mijlim. 



Hob. Mexico, Venta de Zopilote in Guerrero 2800 feet {Smith). 



Head covered with large, deep, distinctly separated punctures ; sparsely covered 

 with long white hair ; the front ocellus in a pit, and behind it on either side is an 

 oblique row of five or six confluent punctures ; the mandible piceous in the middle ; 



