66 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



sparsely pilose, especially at tip; the extreme apical margius of seg- 

 ments very sliglitly rufous. 



Habitat. — California. 



Types 9 in Coll. Aslimead ami National Museum. 



Described from several specimens. 



Mesitius bifoveolatus, sp. uov. 



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

 scopically alutaceous; anteunoi, mandibles, and legs entirely rufous. 

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

 mandibles large, acute. Anteun;e 13-jointed, reaching to tlie teguhe, 

 twisted; the scape swollen, as long as the 4 following joints; pedicel 

 longer but slightly narrower than the first flagellar joint; the flagellar 

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

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

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

 before, the sujierior edge of collar rufous: mesonotum with L' distinct 

 furrows on a delicate line on the scapula;; scutellum Avitli 2 oblicjue 

 fovea} at base; metathorax quadrate, with numerous raised lineations 

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

 truncate sides and apex microscopically striated. Teguhe yellow. 

 Wings subhyaliue, the venation yellow and as in vancoHvercnsis. Ab- 

 domen pointed ovate, nui(;h shorter than the thorax, polished 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 antennte, 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 G 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. Ashmead. 



Described from several specimens. 



Mesitius brachypterus, sp. nov. 



9 . Length, 3.G""". Polished black, with only a few scattered punc- 

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

 wide. Antennte 13-jointed, pale ferruginous, about twice as long as 

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

 pedicel a little longer than wide; first flagellar joint not longer than 

 wide and narrower than the foUowing joints, which are slightly longer 

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

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

 verging posteriorly and terminating in a rounded puncture before at- 

 taining the i>osterior margin; scutellum with 2 oblicpie fove;e at base; 

 metathorax (juadrate, finely shagreened at base, with a faint median 



