J. CHESTER BRADLEY. 



127 



Prislaulacus« (^I'eaiilacus) nielleus Cresson. 



Corvallis, Oregon, July 21st. 



Pri»$laula<-ii!<i (Xeaulaciis) paoificu$« Cressou. 



Corvalli.s, Oregon, July 15tli. 



PriMlaiilaciiK (Xeaiilacus) fa»«ciatiis Say. 



Michigan, coll. Townsend ; Cadet, Missouri, coll. J. C. Earlow ; 



Pennsylvania (two specimens in coll. A. E. S.) ; Marion County, 



Arkansas (J. C. Bridweli). 



PRISTAULACUS Kieffer. 



Type. — Pridaulacm chlapoicskii Kietfer. 



Embraces those species included under Deraiodoiitvs in my former 



l)aper. 



TABLE TO THE SPECIES OF PRLSTAULACUS. 



L Wings dark violaceous. Black, except more or less of the legs, and in the 

 male the apical half of the autennse are yellow. .violacens Bradley. 

 Wings hyaline or slightly clouded, sometimes with fuscous spots and a viola- 

 ceous reflection (2). 



2. Ultimate tooth on the tarsal claw beneath shorter than the penultimate: me- 



dial mesothoracic lobe gibbous and emarginate. Black; apex of the 



petiole aud legs beyond coxae red liopkiiisi n. sp. 



Ultimate tooth on the tarsal claw longer than the penultimate (Fig. 42).- .(3). 



3. Medial mesothoracic lobe strongly gibbous (4). 



Medial mesothoracic lobe not strongly gibbous (5). 



4. Wings hyaline, without violaceous reflection. Abdomen black, except the first 



ventral segment sometimes dull rufous ... -iiiger Shuckard. 



Wings of the female showing strong violaceous reflection ; mesopleurge shal- 

 lowly punctured, wrinkled above. Abdomen rufous, marked with 

 black nioiitana!^ Cresson. 



5. Wings showing strong violaceous reflection in the female; much fuscous 



present in the basal portion, paler in the male; mesopleur^e deeply 

 irregularly reticulated ; ])etiole short. Legs black. 



fuscalatufs Bradley. 



Wings without violaceous reflection, or more than a trace of fuscous in the 



basal portion ; petiole long ; legs flavous • • • • flavicruriis Biadley. 



Pri$«tauIaciiN violaceus Bradley, Zeits. f. Hym. u. Dipt., v, p. 26. 



This species may be distinguished from the others by the dark 



violaceous wings. 



Pristaiilacus lioi>kin!>»ii n. sp. 



9. — Black; apex of petiole and legs beyond the coxa; uniform dull red. Has 

 the ultimate tooth on the tarsal claw shorter than the penultimate. Closely re- 

 sembles Oleifoprister refudorivoruft Westwood, but has the middle lobe of the meso- 

 notuni gibbous and emarginate much more than in that species. Margin of pro- 

 notum has a sharp tooth. 



TR.\NS. AM. ENT. SOC. XXXIV. APRIL. 1908. 



