AMERICAN HYMENOPTERA. 303 



The so-called variety tisiphone Blake is strangely constant in 

 presenting the "rubbed appearance." We have it from Fedor, 

 Texas, and from Xew Mexico. See fig. 30 ; petiole of abdomen 

 from side. 



51. Vlutilla f'ulvoliii-ta Cresson (S9h). 



Plate IV, fig. 31 ; petiole. % . 



Fedor, Texas (Birkman) ; Colorado (Westcott) ; Mesilla and 

 Santa Fe, New Mexico (Cockered); Washington ( M. C. Z.). The 

 head is often black and the second abdominal segment may bear 

 orange spots. 



Group pennsylvanlca. 



52. Jlutilla scseva Blake (90). 



Recorded from Massachusetts, in the Museum of Comparative 

 Zoology. 



53. M ut ilia llensliaw i sp. nov. 



Wholly black, with black and whitish pubescence ; mandibles robust bidentate ; 

 eyes rounded, facetted, ocelli minute ; marginal cell of the blackish wings bluntly 

 pointed. 



Male. Uniformly black over all. Head transverse, somewhat wider than the 

 thorax, somewhat produced behind the eyes and obtusely rounded to the nearly 

 straight hind edge, contiguously and rather deeply punctured ; clypeus short, 

 broadly emarginate at the middle; eyes prominent, more or less irregularly 

 rounded, anterior ocellus minute, posterior ones rudimentary, represented by two 

 smooth plane areas; antennae reaching to the middle legs, the scape slightly more 

 than one-half the distance between the eyes, gradually bent at its outer third, 

 closely minutely but deeply punctured and clothed with erect and decumbent 

 black hairs, basal joints of the flagellum, including the pedicel, equal in length, 

 square in outline; hairs of the head erect, blackish, on each side of the vertex, 

 at base of mandibles, and on the occiput whitish. Prothorax with small, deep, 

 dense punctures, those of the mesonotum slightly less closely placed, scutellum 

 finely rugoso-punctured, pleurse sculptured like the mesonotum, metathorax 

 reticulate, marked with a median line abbreviated in front and behind ; the 

 vestiture of the thorax consists of short erect hairs, whitish along the sutures, 

 the tegula? and the base of the wings, sparse on the metathorax, and blackish 

 elsewhere. Petiole of abdomen somewhat triangular in outline, the front angles 

 dentiform, sessile with the second segment ; seen from the side, it is not nodose 

 and scarcely constricted from the second segment, rather closely punctured like 

 the second segment, but the punctures well separated, ventral carina reduced to 

 a small bisetigerous tubercle; remaining segments more finely and densely 

 punctured, ventral segments sculptured like the dorsals, pygidium finely mar- 

 gined, finely rugose. The sparse and erect hairs of the abdomen are dirty white 

 except on the last three dorsal segments, where they are black. Femoral hairs 

 sparse, whitish, tibia; and tarsi more densely covered with decumbent whitish 

 pubescence, the spines of the hind tibia? and tarsi reduced setiform. Wings uui- 



TEANS. AM. ENT. SOC, XXIX. OCTOBER. 1903. 



