194 NORTH AMERICAN MUTILLIDAE 



mm.; the distance of the former from each other, .25 mm., from the eyes, .47 

 mm., from the front ocellus, .1 mm.; between the antennae two high, thin car- 

 inae diverge shortly, then proceed downward nearly parallel but very slightly 

 converging about half-way to the anterior margin of the clypeus, at which 

 point they are connected by a carina, turn outward, and rapidly diminishing in 

 height, disappear a considerable distance before reaching the reflexed margin 

 of the clypeus, the enclosed space rather oval, smooth and highly polished. 

 Third antennal segment broader than long, approximately two-thirds of the 

 length of the fourth, on its inferior surface. 



Anteriorly the thorax is squarely truncate, its cephalic surface vertical, im- 

 punctate, polished, the humeral angles produced and strongly carinate, an 

 inferior prolongation of these carinae traversing the side pieces of the pronotum 

 obliquely. The most obvious features of the thorax are the large, very thick, 

 tegulae, shaped like a horse-mussel, which slope on either side from a median 

 longitudinal ridge running their entire length, and are very minutely and 

 regularly, but not closely punctulate and setose. The coarse punctuation of 

 the pronotum is much concealed by vestiture, that of the mesonotum less so 

 and more coarse; the scutellum is gibbous and rugosely punctured, with 

 erect hairs longer than elsewhere on the dorsum; dorsal surface of the pro- 

 podeum very coarsely reticulate or irregularly areolate, the median ceils co- 

 alesced into a large irregular areola, with a median carina abbreviated in front 

 and behind, this surface with rosette-like appressed, fine and silky pubescence; 

 the truncate, polished, smooth caudal surface separated from the dorsal by a 

 dentate ridge; the lateral surfaces with three or four rows of coarse reticulate 

 punctures. 



In the hind wing Sc+R+M terminates as a chitinized vein, about half- 

 way to the apex of the cell M, and shows metallic violaceous reflections; other 

 veins are piceous. 



Petiole transverse, rather cylindrical, coarsely punctured, with a keel but 

 no tooth beneath; second segment evenly and coarsely, remaining segments 

 more finely and sparsely, punctured, the pygidial segment rugosety punctured; 

 the last ventral segment black, and closely, somewhat rugosely punctured; 

 third to sixth and base of seventh dorsal segments with a longitudinal keel. 



Type. — Fedor, Lee County, Texas, 1 to 7 June, 1909. Collec- 

 tion of Mr. Nathan Banks. 



Ephuta grisea n. sp. 



c? . Coal-black, with erect and appressed white pubescence, the ai)ex of the 

 petiole and second dorsal segment with a band of fine, curly, white pu])escence, 

 similar but weaker bands on the apex of the third and fourth segments; wings 

 somewhat unevenly infuscated. Length 9 mm. 



Head coarsely rugosely punctured, the front a little less coarsely than the 

 vertex, the sculpture concealed above the base of the antennae by the \'estitin-e; 

 transverse diameter of the hind ocelli .11 mm., of the front ocellus .17 mm.; 

 distance of the former from each other .32 mm., from the eyes .53 mm., from 

 the front ocellus .17 mm.; from between the antennae a carina on each side 



