the niidtne; the postscutellum similarly punctured. Area on nieta- 

 notum wide, its length not twice the width at the base where there is 

 a short longitudinal irregular keel in the center, bordered by a few 

 weak transverse striae ; sides of nietanotum stoutly irregularly reticu- 

 lated, almost smooth on the outer side at the apex. Upper part of 

 propleurae punctured, but not very closely; the metapleurae strongly, 

 striated above, more weakly below. Abdomen weakly punctured at 

 the base, more strongly at the apex, the pygidium deeply strongly 

 punctured all over, its sides raised. The apex of the radial cellule 

 distinctly projects beyond the cubital; the second cubital cellule is 

 widened in front and receives the recurrent nervure distinctly beyond 

 the middle. Calcaria and tarsal spines pale fulvous. 



The apical slope of the nietanotum is finely, closely, irregularly 

 striated. 



3940 Tiphia nevadana sp. nov. 



Black; the pubescence white, the wings hyaline, the nervures and 

 stigma black, the area on nietanotum with two lateral and a central 

 keel reaching to the middle and having three irregular transverse 

 keels on either side of the basal half; the apex depressed; the area 

 is twice longer than wide and is slightly narrowed towards the apex. 

 The sides of the metanotum to shortly beyond the middle are stoutly 

 transversely striated; the apex is depressed, the depression irregularly 

 striated at the base, its apex smooth, the outer edge is rounded and 

 irregularly transversely stoutly, reticulated. Metapleurae stoutly lon- 

 gitudinally striated, the striae broken at the base. Base of propleurae 

 irregularly striated, bordered at the apex by a stout keel; the middle 

 at the base broadly aciculated and finely striated, the rest smooth. 

 Mesopleurae punctured, stnongjly, but not closely. First abdoniinail 

 segment shining, sparsely, weakly punctured, the apex with a strongly 

 punctured belt; the second segment is sparsely and weakly the others 

 more closely and strongly, punctured, the punctuation becoming closer 

 and stronger towards the apex, the apical segments also being covered 

 with white pubescence. Eadial cellule narrowed from the first trans- 

 verse cubital nervure, the apex is rounded and projects slightly beyond 

 the dilated front part of the transverse cubital nervure; the second 

 recurrent nervure is received shortly but distinctly beyond the middle. 

 Vertex sparsely punctured in the center, the inner orbits there with a 

 double row of punctures, of which the inner is the closer and more 

 regular; front, except in the center, closely and strongly punctured. 

 Face strongly punctured in front, the base more closely and weakly. 

 Clypeus projecting, smooth^ its apex not quite transverse and slightly 

 projecting. Legs covered with white hair; the cakaria and tarsal 

 spines pale testaceous. Mandibles black, slightly piceous towards the 

 apex; palpi blackish-testaceous. Male. Length 6 mm. Ormsby cou- 

 ntv, Nevada. 



