242 WILLIAM J. FOX. 



55. fliitilla Bollii n. sp. 



9, — Ferrugiuoiis ; abdoiueu from apex of second segment black; legs rufo- 

 piceous; dorsals 3-6 medially and at sides with silvery pubescence, a spot at 

 apex of dorsal segment 2 in the middle and ventrals 2-4 with a fringe, of similar 

 pubescence; head subqnadrate, wider than thorax, covered with strong, close 

 punctures, postero-lateral angles rounded, unarmed ; thorax broadly pyriform, 

 tending somewhat to hexagonal, coarsely punctured and distinctly; ventral 

 carina of first segment subemarginate ; second dorsal coarsely and closely punc- 

 tured, nnicolorous, except apex; second ventral with large, separated punctures; 

 pygidium coriaceous, with some punctures and stripe. Length 12 mm. 



Texas: Dallas (Boll). One specimen. In the five preceding 

 species we have the connecting links between the elongated thorax 

 species and those in which the thorax is hexagonal. In Bollii the 

 thorax is less pyriform than in saevola or cariniceps and tends to 

 hexagonal, and the sculpture of the pygidium is more like that of 

 the aggregation of species with hexagonal thorax. 



The following twenty-two species are known in the male sex 

 only, and while it is certain that they belong to the occidentalis 

 group, they cannot be placed systematically with any degree of 

 certainty : 



56. Mutilla coccineohirta Blake. 



Mutilla {Sphaerophihalma) coccineohirta Blake, 1. c., iii, 235. % , 1871. 

 l^phserophthnlma coccineohirta Blake, ibid, xiii, 221, % , 1886. 



California. That which Blake has described, rather vaguely, as 

 the female of this species seems to be californicus Rads., and belongs 

 to another section of the group. 



57. Mutilla testaceiveiitris n. sp. 



%. — Black, slightly inclining to piceous in places; head and thorax as far as 

 middle segment and abdomen above from middle of segment 2 with long scarlet 

 pubescence; dorsals, from middle of segment 2, with reddish ground color; 

 ventrals 3-7 testaceous, with reddish pubescence; pubescence of remainder 

 of body black ; reticulation of middle segment rather large and distinct; carina 

 of first segment strongly angulate medially, the segment tolerably nodose ; wings 

 fuscous, third submarginal indistinct, first and second transverso-cubital veins 

 distinctly separated above. Length 8i mm. 



California : Poway. Distinct from coccineohirta in the shape of 

 ventral carina of .segment 1 (dentate in coccineohirta), ground color 

 of abdomen from segment 2 and shape second submarginal cell, 



58. Mufilla iirsnla Cress. 



Mutilla Ursula Cresson, Tr. Am. Ent. Soc, v, 120, 'J,, 1875. 

 Sphaerophthalma Ursula Blake, ibid, xiii, 218, % , 1886. 



Texas; Colorado; New Mexico ; Arizona; Utah. A specimen, 



