80 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Anteniiii' lO-jointed, longer tbiiu the body, setaceous, tbe scape very 

 long, longer than the head, slender and curved at base, tbe pedicel 

 small, the remaining. joints lengthened. 



Maxillary palpi j«»ng, 5 jointed, the terminal joint the hnigest, the 

 third tbe shortest; labial palpi very short; apparently 3-jointed (?). 



Mandibles small, truncate at tips, 3 dentate. 



Thorax elongate, abruptly truncate behind, the protborax (piadrate, 

 as long as the mesonotum, but narrower, tbe sides compressed and 

 with a deep median channel above, as in Ampnlex; mesonotum without 

 furrows, except two very short obli<iue grooves anteriorly; scutellum 

 triangular, with three conHuent fovea' at base; metatborax quadrate, 

 rugose, the posterior truncature abrupt, the angles a little rounded. 



Front wings smoky, the stigma moderate, lanceolate, tbe marginal 

 cell almost closed, two basal and two distinct discoidal cells; besicjes 

 there is an indistinct submarginal cell, 



F"ud wings lobed at base, with a distinct venation. 



^ibdomen ovate, subpetiolate, the second and third segments occupy- 

 ing most of its surface. 



Legs rather long, the femora obclavate, the anterior i)air the shortest 

 and stoutest, the tibial spurs on the hind legs long. 



In venation this remarkable genus resembles Emholemus Westwood, 

 but otherwise it is quite distinct, and \cQ,'A\\i^ WiinopHiH i\i\i{ Ampidcjc. 

 The long, (juadrate, sulcate pronotum at once distinguishes the genus. 

 I know of but a single species, as follows : 



Ampulicomorpha confusa, 8]). nov. 

 (PI. V, Fig. !,<?.) 



S. Length, 4"'"'. Polished black; metatborax above and on the 

 truncature rugose; antenna' brown; leg.s black, tbe trochanters, tibia*, 

 and tarsi i)iceous or dark rufous. 



Wings fuliginous, the venation dark brown, tbe sec<md basal cell 

 shorter than tbe tirst; all the nervures are well developed. 



Habitat. — California. 



Type $ in Coll. Ashmead. 



Described froiii a single s]>eeimen. Since the above was written I 

 have seen another specimen in tbe collection of tln^ American Ent*>mo- 

 logical Society, taken in Nevada. It ditters in being slightly smaller 

 and with paler colored wings. 



Subfamily IIL—DKYININ^E. 



Head trans v^erse or sub(iuadrate; when viewed from in front often 

 triangular. Ocelli 3, in a triangle. Mandibles stout, 3- or 4 dentate. 

 Antennae porrect, tiliform or subclavate, pubescent or pilose, lO-jointed 

 in both sexes, inserted just above the clypeus. Maxillary palpi 3- to 

 5-joiuted; labial i)alpi l! to 4-jointed. Pronotum variable, very short, 



