232 AMERICAN HYMKNOPTERA. 



One male and female from Illinois, Canada (Cresson) and South 

 Haven, Mich. Type, coll. Amer. Ent. Soc. 



Diaborus iiebraskeiisiN n. sp. 



1, . — 7.5 nun. Black, with yellow markings as follows: face, anterior orbital 

 lines, enlarged above the eyes, scape beneath, month-parts, cheeks behind eyes, 

 prothorax, tegulse, line on lateral mesonotum, recurved along parapsidal grooves, 

 scutellums, lower half and anterior portion of mesopleura. longitudinal stripes 

 on mesonotum ; metathorax entirely, except basal suture and most of the two 

 median apical areas, all coxte and trochanters, carinse on basal abdominal seg- 

 ment, broadening laterally toward apex, apical third of all following segments 

 and a large median spot extending nearly to the base on segments 2-4; antennae 

 reddish brown, blackish at base above; wings hyaline, nervures and stigma 

 brown, pale at base; head and thorax polished, finely and sparsely punctured; 

 lower mesopleura and metathorax more closely punctured ; second lateral area 

 of metathorax and basal segment of abdomen, aciculate ; second segment polished, 

 punctured at base and with broad oblique grooves; the tarsal claws are long and 

 pectinate only at base. 



One specimen from Nebraska. Type, coll. Amer. Ent. Soc. 



Diaborus ornatiis Walsh (Exenteron), Trans. St. Louis, Acad. iii. 105. 



"£ . — 6 mm. Head and thorax black, with face, scape beneath, mouth-parts, 

 cheeks, tegulae, line in front, more or less of pectus, sternum and scutellums, four 

 anterior coxae and all trochanters, yellowish white; remainder of legs pale ru- 

 fous; antennje dusky, rufous toward apex ; abdomen rufous, more or less dusky 

 at apex, and with apex of segments often margined with yellow ; basal segment 

 black with median apical rufous spot; wings hyaline, veins and stigma brown, 

 whitish at base ; cubito-di'scoidal vein not broken ; metathorax oval, not spinose ; 

 basal segment of abdomen carinate, rugulose; second segment with oblique basal 

 grooves. This is probably the % of D. dorsalis. 



Four males from New Hampshire, Illinois (Walsh). Type, ? 



Diaborus dorsalis Cress. (Cteniscus). Proc. Ent. Soc. Phil, iii, 282. 



9 . — 6 mm. Rufous, with face, mouth-parts, cheeks, scape beneath, tegulse, 

 line in front, pectus, tip of scutellum and median apical spots on abdominal seg- 

 ments yellow; legs rufous, with trochanters and four anterior coxse, yellowish: 

 wings hyaline, nervures and stigma yellowish brown; cubito-discoidal nervure 

 gently curved, not broken and without stump of a vein ; first abdominal segment 

 finely and closely punctured, carinse weak; base of second segment punctured 

 and with oblique grooves; metathorax oval, areolated. subpolished. 



Two specimens from Illinois (type, coll. Amer. Ent. Soc). 



Diabortis nigrocephalus n. sp. 



9. — 6 mm. Ferruginous, with head black ; face, mouth-parts, cheeks beneath 

 and tegulfe reddish yellow; wing hyaline with nervures and stigma dark brown, 

 paler at base ; cubito-discoidal nervure broken and with a short stump ; meta- 

 thorax areolated, polished ; abdomen polished, with first and base of second seg- 

 ment closely and finely punctured; carinse on basal segment weak; oblique 

 grooves at base of second segment deep and narrow. 



One specimen from Georgia (type, coll. Amer. Ent. Soc). 



