370 HYMENOPTEKA. 



59. Iphiaulax lacteifasciatus. 



Niger, abdominis basi segmentisque 2° et 3° lateralibus ferrugineis ; alis fuliginosis, apiee laeteis. $ . 

 Long. 8 millim. ; terebra 4 millim. 



Hah. Mexico (Bilimelc). 



Antennas longer than the body (being nearly 11 millim. in length), filiform, micro- 

 scopically pilose ; basal joint thick, semioblique at the apex, more than twice as long 

 as the second. Face finely rugose; front aciculated ; vertex shining, impunctate; 

 eyes large, oval, reaching nearly to the apex of the clypeus. Thorax shining, impunc- 

 tate, sparsely pilose, the metathorax with but few hairs ; the hairs black and rather 

 long. Petiole semivertical, deeply excavated at the base, the excavation occupying 

 nearly half the total length ; the central part rounded at the apex ; it bears a few 

 punctures ; the inner furrow wide, deep, with one or two indistinct transverse keels. 

 Second segment with the area small ; the area longer than broad, pointed at both ends 

 (but much more acutely so at the apical end), and prolonged as a sharp keel nearly to the 

 apex, and having a broad, moderately deep, depression on either side ; the base raised, 

 shining, impunctate; the lateral depression oblique, broad, deepest towards the apex, 

 where there is a broad raised irregular keel. Suturiform articulation broad, stoutly 

 keeled ; the lateral branches not striated, short, the apical one much the widest ; the 

 two central keels converging at the apex and united to another rather stout one, which 

 latter reaches a little beyond the middle of the segment. The first and second furrows are 

 moderately deep, the first twice the width of the second. The segments are raised at 

 the apex, depressed at the base, and rather strongly punctured (except at the apex, 

 where the punctuation is weaker), the punctures somewhat large and clearly separated. 

 The abdomen is longer than the head and thorax united, and becomes gradually 

 narrower from the hinder part of the second segment to the apex. Wings rather long ; 

 the apical cloud extending from the apex of the stigma, and there is a darker oblique 

 cloud in the first cubital cellule. 



60. Iphiaulax divinator. 



Niger, abdomine rufo ; alis fumatis, basi fusco-hyalinis. $ . 

 Long. 8 millim. ; terebra 2-5 millim. 



Eab. Guatemala, San Geronimo {Champion). 



Antennae longer than the body, tapering towards the apex ; basal joint not much longer 

 than the second and third joints together, and of nearly equal width. Head densely 

 covered with long white hair ; the face nearly transverse ; the front depressed, but not 

 deeply so; ocelli raised; clypeus not projecting at the apex; tips of the mandibles 

 piceous. Thorax pilose, very densely so on the metathorax ; the hair white. Abdomen 

 broader and not much longer than the thorax. Petiole semiperpendicular, dilated at 

 the apex ; the central part obtusely keeled towards the apex and obscurely punctured ; 



