6S BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



sparsely pilose, especially iit tip; the extreme apical margins of seg- 

 ments very slightly rufous. 



Habitat. — California. 



Types 9 in Coll. Ashmead and National Museum. 



Described from several specimens. 



Mesitius bifoveolatus, sp. nov. 



9 . Length, 5.5"'"'. Polished black, impunctured, the surface micro- 

 scopically alutaceous; antenna?, mandibles, and legs entirely rufous. 

 Head about one and a half times as long as wide. The outer tooth of 

 mandibles large, acute. Antennje 13-jointed, reaching to the teguhe, 

 twisted; the scape swollen, as long as the 4 following joints; i)edicel 

 longer but slightly narrower than the first Uagellar joint; the llagellar 

 joints very slightly but gradually increasing in length, the first wider 

 than loiig, the last very slightly more than twice as long as thick. 

 Prothorax three and a half times as long as the mesonotum, rounded 

 before, the superior edge of collar rufous; mesonotum with 2 distinct 

 furrows on a delicate line (ni the scapula;; scutellum with 2 obli«jue 

 foveie at base; metathorax quadrate, with numerous raised lineations 

 at the middle and base, almost smooth towards the lateral margins, the 

 truncate sides and apex microscopically striated. Teguhe yellow. 

 Wings subhyaline, the venation yellow and as in vancourereima. Ab- 

 domen pointed ovate, mu(!h shorter than the thorax, ])olished black, 

 pilose towards apex and with the extreme edges of apical margins of 

 the last three or four segments rufous. 



The S is from 3.5 to 4""" long and is recognized at once by the long 

 fuscous antenme, as long, or nearly as long, as the body, the first flagellar 

 joint being half again as long as the pedicel, the joints beyond fully 

 four times as long as thick, the last 5 or times as long as thick, and 

 by the more fuscous wings; otherwise it is quite similar. 



Habitat. — Georgia, Florida, Canada. 



Types in National Museum and Coll. AvsLmead. 



Described from several specimens. 



Mesitius brachypterus, sp. hot. 



9 . Length, 3.6'""'. Polished black, with only a few scattered punc- 

 tures on the head and prothorax. Head oblong, one-fourth longer than 

 wide. Antennie 13 jointed, pale ferruginous, about twice as long as 

 the bead; scape as long as the first three joints of the flagellum united; 

 pedicel a little longer than Avide; first flagellar joint not longer tliau 

 wide and narrower than the foUowing j(»ints, which are slightly longer 

 than thick. Prothorax long, as long as the head; mesonotum very 

 short, scarcely as long as the scutellum, Avith 2 delicate furrows con- 

 veiging posteriorly and terminating in a rounded puncture before at- 

 taining the posterior margin; scutellum with 2 oblique fovejc at base; 

 metathorax quadrate, finely shagreened at base, with a faint median 



