AMERICAN ECYMENOPTERA. 21 



of mesonotuni, line on side between meso- and metathorax, tip of scntellum and 

 post-scutelluni reddish yellow. One 9 l^is the entire mesothorax rufous. Ab- 

 domen closely punctured and covered with a fine sericeous pile. 



% ■ — Has the face, scape beneath, prosternum, more or less of pleura, and gen- 

 erally the legs, except posterior femora, white. 



Seven female and six male specimens ; two from Xew Ham])shire, 

 one from Ottawa, and the remainder from Colorado. 



PRO.'»IETHlTS Foerster. 



Mesonotuni black, without yellow markings costalis Prov. 



Mesonotum with yellow bauds in front of tegulai. 



9 . — Posterior coxae black or yellow ; %, with the face entirely yellow. 



elougatui^ Prov. 



9 . — Posterior coxae same color as femora ; % face black, yellow down the 



centre rniicrus Walsh. 



Prometlins costalis Prov. (Bussus), Faun. Ent. Can. ii, 432, 9 . 

 B. Imujicornis Prov. ibid. 799, % . 

 B. acicidatus Prov. Add. Faune Hymen. 368, 9 • 

 B. auriculattis Prov., ibid. 429, 9 • 

 9 • — Length 4-5 mm. Head, thorax, base, and usually extremity of abdomen, 

 shining black ; mouth, tegute, spot in front and line beneath each wing, light 

 yellow ; antennae slender, reddish brown. Wings large, vei-y clear, veins and 

 stigma light brown ; areolet incomplete, pentangular in outline. Aljdomen slen- 

 der ; first and second segments aciculated, tij) of segment 2, all of 3 and 4, and 

 base of 5, rufous. Legs, except coxae, honey-yellow. 



% . — Differs only in having the entire face and scape beneath, light yellow. 

 The three synonyms of costalis are all from descriptions of males. 



Four female and four male specimens ; Canada, Xew Hampshire, 

 Montana, Washington. 



Prouiethus eloiigatus Prov. {Bassus), Faune Eut. Can. ii, 799, % 9 • 



9 . — Length 4-5 mm. Black, with segments 2, 3 and 4 of the abdomen more 

 or less red ; antennae reddish brown ; spot beneath at base, mandibles, palpi, 

 tegulae, spot in front, beneath and above on mesonotum, trochanters and tips of 

 coxae yellowish white. Base of coxae generally black ; posterior tarsi dusky ; 

 remainder of legs honey-yellow ; metathorax coarsely punctured ; fii-st segment 

 of abdomen long, rectangular and rugose ; second segment aciculated. 



% . — Differs in having the entire face, antennae beneath and a crescent on the 

 mesonotum yellowish white. 



Four female and two male specimens from Canada, New Hamp- 

 shire and Michigan. 



Proiiietlius rnficrus Walsh {Bassus), Trans. St. Louis Acad, iii, 86, % . 



9 . Length 5.5 mm. Black, polished ; central portion of abdomen, legs and 

 antennae rufous: spot beneath antennae extending on to sides of clypeus, mandi- 

 bles, except tips, palpi, tegulae, spot in front, lines beneath each wing, short line 

 on mesonotum, transverse line cm pro.sternum, diagonal line on mesopleui"ae, all 



TKANS. AM. ENT. SOC. XXII. FEBRUARY, 1895. 



