386 [June 



thorax, densely clothed with a long, ochraceous-yeJJow pubescence, 

 rather thin on the cheeks ; eyes small, round, entire and convex ; an- 

 tenna; black, the scape with ochraceous-yellow pubescence, the flagel- 

 lum sericeous. Thorax ovate, abrupt on the sides and behind; the 

 upper surface, except of the metathorax, clothed with a long, dense, 

 coarse, ochraceous-yellow pubescence, which also fringes the ridge, be- 

 tween the two lateral excavations; metathorax above clothed with long, 

 dense, black pubescence. Legs black ; the coxae beneath, the femora 

 and base of tibiae, clothed with a long ochraceous-yellow pubescence ; 

 rest of the tibiae and the tarsi with black pubescence. Abdomen large, 

 ovate, clothed with a long, dense, coarse, ochraceous-yellow pubescence; 

 the node and the extreme base of the large basal segment clothed with 

 black pubescence ; on the venter the pubescence is not so dense. Length 

 11 lines. 



Hal, — Cape St. Lucas, Lower California. One specimen. Mr. H. 

 Dike. (Coll. Ent. Soc. Philad.) 



3. Mutilla aureola, n. sp. 



Black; head, thorax and abdomen above, clothed with golden-yellow pube- 

 scence; head large, quadrate, wider than the thorax ; legs black. 



Female. — Black, coarsely punctured; head large, quadrate, wider 

 than the thorax, clothed above the antennae with a dense, deep golden- 

 yellow pubescence ; on the rest of the head the pubescence is black ; 

 eyes small, round, entire, convex and polished; mandibles black, also 

 polished; antennae piceous-brown, the scape with black pubescence, the 

 flagellum tinged with rufous, sericeous. Thorax very short and broad, 

 somewhat strangulated behind the middle, abrupt on the sides and be- 

 hind, the upper surface densely clothed with a deep golden-yellow pu- 

 bescence ; metathorax abruptly truncate behind, and, as well as the 

 sides of the thorax, sparsely clothed with black pubescence. Legs black, 

 with long, scattered, black pubescence. Abdomen ovate, densely clothed, 

 except base, with long, appressed, deep golden-yellow pubescence; the 

 node, the base of the large basal segment above, and the whole of this 

 segment beneath, except its apical margin, clothed with black pube- 

 scence ; above, the black on the large basal segment slightly indents 

 the yellow on the basal middle; the node is small, circular at tip and 

 flattened above at base ; all the ventral segments have an apical fringe 

 of dense golden-yellow pubescence. Length 62 lines. 



Hob.— California. Mr. H. Ulke. (Coll. Ent. Soc. Philad.) 

 One specimen. Allied to M. California Radochkovsky, but differs 

 by the large quadrate head and the shorter thorax. 



