20 HYMENOPTERA. 



Fore wings regularly rounded, moderate in width, the marginal 

 fringes gradually lengthening distad, there moderately long but dis- 

 tinctly not as long relatively as in nana, about a fifth as long as the 

 greatest wing width, absent on both margins proximad of the distal 

 end of the marginal vein, very much longer than the discal cilia. The 

 latter are arranged in about from 12 to 15 longitudinal lines and are 

 absent proximad of the distal end of the stigmal vein excepting for a 

 small, irregular group of about 6 to 8 which projects proximad from 

 the main group of cilia ; the longest distal marginal fringes of the fore 

 wing is distinctly shorter than the longest fringes of the caudal margin 

 of the posterior wing, about a third shorter. Discal ciliation of the 

 fore wing moderately short, distinct, in regular lines. 



Posterior wings narrow, acute at the distal end of the submarginal 

 vein along the cephalic margin or at the booklets, the blade not 

 acutely pointed, the two margins not parallel or similar, the marginal 

 cilia of the cephalic margin moderately long to short, not short but 

 very much shorter than those of the caudal margin which are very 

 long, very much longer than the blade is wide and about twice as long 

 as the greatest width of the blade. Discal ciliation consisting of a 

 single longitudinal line of cilia running from the marginal vein to the 

 apex, nearer the cephalic margin, the cilia near the apex much farther 

 apart in the line and the line not reaching the apex. Sometimes a 

 single seta is present caudad of the principal line of cilia, near its base as 

 though representing a second line now obsolete. The usual line of 

 discal cilia along the edges of the blade between the insertions of the 

 marginal cilia absent. 



Venation of the fore wing forming a regular bow whose longer arm 

 is the stigmal vein ; submarginal vein longest by far, thickening at its 

 distal third, the marginal vein thickest and shortest, but comparatively 

 not much shorter than the slender stigmal vein which bears an ovate 

 club or knob bearing a slight uncus ; the knob forms not quite a half 

 of the length of the whole vein ; marginal vein less than one-half as 

 long as the stigmal vein ; the marginal vein bears two conspicuous 

 setae about equally long, another similar seta being borne by the sub- 

 marginal vein at its distal end. 



Antennae 6-jointed, the scape moderately long, cylindrical, subequal 

 to the club in length and somewhat longer than the pedicel, ring-joint 

 and the two funicle joints taken together ; pedicel obconic, about half 

 the length of the scape, narrow proximad ; the ring-joint narrow, dis- 

 tinct ; the funicle joints subequal, subquadrate, slightly wider than 

 long, about subequal in width to the apical end of the pedicel, the first 

 funicle joint somewhat the larger, somewhat wider and longer ; the 

 solid club about three and one-fourth times longer than wide, the 



