AMERICAN HYMENOPTERA. 301 



35. iVIutilla precilonota sp. nov. 



Female. Ferruginous. Head subquadrate, but slightly wider than the thorax, 

 the hind angles rounded, the sculpture of the upper surface concealed beneath 

 the dense covering of golden-yellow matted hairs, the erect hairs of the head 

 and thorax short and sparse, yellow, punctures of cheeks strong, clypeal margin 

 lightly crenulate ; antennae pale ferruginous, scape more slender but sculptured 

 and clothed as in obscura, i. e., with uniform, sparse, short hairs and rather coarse 

 punctures; mandibles slender, acute, uniformly bent, black apically, palpi rufo- 

 piceous. Thorax broad and truncate in front, due to the expanded dentate 

 humeri, sides of mesothorax parallel, metathorax narrowed, truncate posteriorly ; 

 seen from the side, the dorsum presents a convex outline, dorsum coarsely punc- 

 tured, becoming reticulate posterior to the metathoracic spiracles, the disc of the 

 metathorax, however, smooth and impunc.tate, sculpture above largely concealed 

 beneath the matted golden-yellow pubescence, pleurae impunctate except above 

 the middle coxse. Disc of petiole of abdomen smooth, margins with deep punc- 

 tures, petiole nodose, strongly constricted from the second segment, apically with 

 a patch of silvery pubescence, its anterior f angles dentiform, the ventral keel not 

 deep, convex, entire; disc of second segment with deep subconfiuent punctures, 

 those of the under surface more separated and rounded, remaining segments with 

 smaller and denser punctures ; the disc of the second segment marked beyond 

 the middle with two rounded patches of sparse whitish appressed hairs, elsewhere 

 with blackish pubescence, the lateral and ventral margins of the second, third, 

 and fourth segments, and the mid-dorsum of the third, fourth, and fifth segments 

 fringed with denser silvery pubescence, hairs of apex of abdomen black ; pygidium 

 closely granular. Spines of the legs black, less prominent than in the female of 

 obscura. 



Length, 8 mm. 



Plate IV, fig. 23; petiole. 



Described from a single female specimen collected in the Trans- 

 Pecos region of western Texas. 



Although agreeing in general with obscura, this species is mark- 

 edly and specifically distinct by the dense vestiture of the head and 

 thorax. The dentiform humeri are also characteristic. 



36. II lie ilia Bollii Fox (55). 



Plate IV, fig. 24; petiole. 



Not rare. Fedor and Austin, Texas. May to October. 



37. :f: Jlutilla cocciiicohirta Blake (56). 



One male, Las Cruces, New Mexico (Cockerell). 



38. H til ilia ochracea Blake (59b 



We have seen a male of this species from Nevada. 



39. *Mutilla bioculata Cresson (60). 



Several specimens of this species were taken at Bath, Illinois, by 

 Mr. Brues and myself, during August, 1899. Texas (M. C. Z.) 



TRANS. AM. KNT. SOC, XXIX. OCTOBER. 1903 



