196 CHARLES A. BLAKE. 



thinly clothed with brownish hairs, second segment fulvous, finely punctured, 

 having on the disc a longitudinal black patch, extending nearly to the apical 

 margin, the remaining segments clothed with dense golden fulvous pubescence ; 

 under side clothed with short fulvous hairs. Length 15 mm. ; expanse of wings 

 25.5 mm. 



Hab. — Colorado. 



Mutilla oajaea Blake. 



Male. — Head and thorax black, closely and deeply punctured, clothed with 

 scattered pale yellowish pubescence; eyes large, ovate, emarginate; antennae 

 black; metathorax rounded, posteriorly abrupt, with a scattered black pubes- 

 cence ; wings blackish, paler towards the base, marginal cell moderately long, 

 rounded at tip, extending beyond the third submarginal, three submarginal cells, 

 the first about as long as the marginal, the second shorter and narrowed towards 

 the first, receiving the first recurrent nervure about the middle, the third sub- 

 marginal clearly defined, subpentagonal. Legs black, clothed with long, pale, 

 yellowish pubescence. Abdomen elongate ovate, ferruginous above and beneath, 

 finely punctured, apical margins of all segments fringed with bright fulvous pu- 

 bescence ; basal segment black. Length 15 mm. ; expanse of wings 21 mm. 



Female.— Head deep black, densely punctured, wider than the thorax, with 

 scattered, erect black hairs ; eyes large, ovate, entire ; antennae black. Thorax 

 ferruginous, elongate quadrate, sides slightly concave ; metathorax 

 abruptly truncate behind. Legs shining black, clothed with glittering 

 hairs. Abdomen ovate, black, apical margin of basal segment fringed 

 with pale golden pubescence, on the dorsal surface of second segment 

 there are two elongate quadrate patches of dense, pale, golden pubes- 

 cence, extending half way to the apical margin, which is ornamented 

 with a broad band of pale golden pubescence having the interior mar- 

 gin sinuate ; the remaining segments have a patch of pale pubescence 

 on each side, together forming a V shaped line to the apex ; beneath, 

 the margins of the segments are fringed with pale glittering hairs. Length 

 13 mm. 



Hab. — Mexico. Prof. F. Sumichrast. 



In some individuals the head is ferruginous. 



Mutilla ornativentris Cresson. 



Female. — Rufous, very densely punctured. Head transverse, not quadrate, 

 broader than the thorax ; the mouth with long ochraceous pubescence ; eyes mod- 

 erate, ovate, entire ; mandibles blackish ; antennae blackish, sericeous, the three 

 or four basal joints rufous. Thorax elongate, narrow, somewhat rounded in 

 front, the sides subparallel, a little strangulated about the middle, and again 

 widened posteriorly, the sides and behind abrupt ; upper surface with a short 

 fuscous pubescence, the sides with a very short, fine, dense, cinereous pile. Legs 

 rufous, with ochraceous pubescence ; tips of the femora, most of the tibiae and 

 the tarsi, fuscous. Abdomen elongate, ovate, much narrowed to the apex, black- 

 ish above, reddish beneath ; all the segments with a broad apical band of dense 

 silvery cinereous pubescence, the anterior middle of which is more or less sinuate 

 or emarginate ; large basal segment, with a large patch of silvery sericeous pu- 

 bescence, sometimes obsolete on each side at base ; the apical segments above are 



