JAMES CHESTER BRADLEY 207 



pubescence, which is lengthened apically into a brush, not carinate; the first 

 segment of the flagellum not strongly compressed, equal to the second. 



Side pieces of pronotum, each with an inferior carina near its anterior 

 border; scutellum strongly convex and coarsely closely punctured; mesopleura 

 with an oblique fossa, interrupted before the hind margin; mesosternum on 

 each side with an oblique, not carinate tubercle, inner surface of mesocoxae 

 with a swelling, smooth in front, their posterior surface without a subapical 

 tooth. 



Carina beneath the petiole rather prominent, thick, deepl}^ notched in the 

 middle; middle of the second ventral near the base shghtly prominent but 

 rounded, not carinate; fifth ventral on each side with a trace of a tubercle, 

 sixth with a mammiliform tubercle, seventh and eighth with oblique carina© 

 strongly elevated and subtruncate posteriorly; pygidial segment at apex with 

 a Y-shaped carina, the two arms of which are broadly spreading and enclose 

 the end of a raised, impunctate, polished, median longitudinal platform. 



Type. — Dallas, Texas. Collection of the American Ento- 

 mological Society. 



Mutilla (Timulla) grotei Blake 



1871. Mutilla grotei Blake, Trans. Amer. Ent. Soc, 3:228, d" . 



Transverse diameter of the posterior ocelli, .17 mm., their 

 distance from the eyes .58 mm., from each other .51 mm., from 

 the front ocellus .30 mm. 



Habitat. — Colorado and, according to Melander, Texas. 



Mutilla (Timulla) briaxus Blake 



1871. Mutilla briaxvs Blake, Trans. Amer. Ent. Soc, 3:227, cf. 



1887. Mutilla canadensis Provancher, Add. et Corrections au vol. ii de la 



Fauna Entomologique du Canada, Traitant des hymenopteres, p. 



250, cf. 

 1897. Mutilla secunda Dalle Torre, Catalogus hymenopterorum, 8:84, 



(/ 1899. Mutilla hexagona Fox, (pars), Trans. Amer. Ent. Soc, 25:270, o^. 



1909. Mutilla (Timulla) briaxus Rohwer, Trans. Amer. Ent. Soc, 35:132, 



:-^, 9 . 



cf . Diameter of posterior ocelli .23 mm., their distance from 

 the eyes .61 mm., from each other .51 mm., from the front ocellus 

 .21 mm.; front and clypeus deeply concave, highh-- polished, 

 laterally striolate almost to the bases of the manchbles; these 

 with a deep external notch and strong tooth. Scape with a 

 weak carina obscured by vestiture. 



Not only the brush on the apex of the scape, but the armature 

 of the apical segments, the structure of the clypeus and other 



TRANS. AM. ENT. SOC, XLII. 



