80 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Antennae lO-Joiiited, longer than the body, setaceous, the scape very- 

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

 small, the remaining joints lengthened. 



Maxillary i)al])i long, 5-jointed, the terminal joint the h>ngest, the 

 third the shortest; labial palpi very short; apparently 3-jointed (f). 



Mandibles small, truncate at tips, 3-dentate. 



Thorax elongate, abruptly truncate behind, the ])rothorax quadrate, 

 as long as the mesonotum, but narrower, the sides cojiipressed and 

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

 furrows, except two very short oblicpie grooves anteriorly; scutellum 

 triangular, with three confluent foveie at base; metathorax quadrate, 

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



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

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

 there is an indistinct submargiual cell. 



Hind wings lobed at base, with a distinct venation. 



Abdomen ovate, subpetiolate, the second and third segments occupy- 

 ing most of its surface. 



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

 and stoutest, the tibial si)urs on the hind legs long. 



In venation this remarkable genus resembles Emholemus Westwood, 

 but otherwise it is quite distinct, and v^c^W-a Bhinopsls \\\\(\. Ampulex. 

 The long, quadrate, sulcate pronotum at once distinguishes the genus. 

 I know of but a single species, as follows: 



Ampulicomorpha confusa, h\k uov. 

 (Pl.v.Fig.l, ,?.) 



$. Length, 4""". Polished black; metathorax above and on the 

 truncature rugose; antenna' brown; legs black, the trochanters, tibia', 

 and tarsi i)iceous or dark rufous. 



Wings fuliginous, the A^enation dark brown, the second basal cell 

 shorter than the first; all the nervures are well develojted. 



Habitat. — California. 



Type $ in Coll. Ashmead. 



Described from a single specimen. Since the above was written I 

 have seen another specimen in the collection of the'American Entomo- 

 logical Soci<'ty, taken in Nevada. It differs in being slightly smaller 

 and with paler colored win^s. 



Subfamily III.— DKYININaE. 



Head transverse or subcpiadrate; when viewed from in Iront often 

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

 Antenna? porrect, filiform or subclavate, pubescent or pilose, lO-jointed 

 iu both sexes, inserted just above the clypeus. jMaxillary palpi 3- to 

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



