62 Mr. P. Cameron on new Fossorial Hymenoptera 



Scutellum rugose above, the extreme apex only smooth ; 

 the median segment thickly covered with white 

 pubescence, which hides the sculpture ; the sides 

 of the apical two ventral segments armed with 

 stout teeth cona. 



M. cona may further be known from sexmaculata by the 

 wings not being so deeply violaceous and by having hyaline 

 streaks in the cubital cellules, by the scutellum not being so 

 distinctly pyramidal, by the metathorax not being so dis- 

 tinctly narrowed at the base, by the smaller ventral keel, and 

 by the more strongly punctured mesosternum. 



Various species have been regarded as the male of M. sex- 

 maculata^ but there has always been some doubt under what 

 name, if any, the male has been described. I am now able 

 to put the matter at rest, Mr. G. A. J. Kothney having taken 

 sexmaculata ? in cop. with its male. I am not sure if this 

 male has been described by anyone ; but it comes nearest to the 

 description of dimidiata, Lep. sec. Bingham. The true male 

 is from 20-24 millim. long, is black, with the abdomen red, 

 black at base and apex, the head and thorax deeply covered 

 with white pubescence, and the wings deeply violaceous. 

 Its characteristic points are the pyramidal scutellum, which 

 is broadly smooth and shining above ; the ventral keel, pro- 

 jecting shortly beyond the middle into a stout somewhat 

 triangular tooth ; the apical two ventral segments are marked 

 on either side with a stout somewhat oblique keel ; the upper 

 part of the apical ventral segment at tiie sides is smooth and 

 shining ; below this, and above the keel, it is closely punc- 

 tured ; the upper part of the mesopleurge is tuberculate, as is 

 also the lower, but to a less extent. 



Mutilla selma, sp. n. 



Nigra, apice petioli segmentisque 2°-5'' rufis ; alls violaceis. c? • 

 Long. 12-13 mm. 



Scape of antennas sparsely covered with long white hairs. 

 Front rugose ; the vertex sparsely covered with strong punc- 

 tures ; cljpeus smooth, shining, glabrous, the middle indis- 

 tinctly keeled. Mandibles shining, broadly rufous before the 

 apex, smooth, sparsely covered with long white and fulvous 

 hair ; the tooth on the lower side at the base is large, longer 

 than broad, rounded at the apex. Pronotum rugosely punc- 

 tured, the base and middle to near the apex smooth and 

 shining. Mesonotum shining, deeply punctured, the punc- 

 tures large, deeper and more widely separated towards the 

 apex, sparsely covered with black hair ; the furrows are 



