388 [June 



and convex; apical half of mandibles black; antennae ferruginous, dusky 

 towards the apex. Thorax short, subquadrate, broad and slightly 

 rounded in front, somewhat strangulated about the middle, and abrupt 

 and truncate behind, the lateral margins serrate ; upper surface blackish, 

 with fuscous pubescence; a patch on each side of the metathorax above, 

 as well as most of its posterior face, with a short golden-sericeous pube- 

 scence ; the lateral excavation very large, rather deep, smooth and po- 

 lished. Legs ferruginous, with yellowish pubescence. Abdomen ovate, 

 broad at base, rather densely clothed with short, appressed, golden-se- 

 riceous pubescence, paler on the apical segments; on the basal middle 

 of the second segment above, a large rounded fuscous spot, extending 

 a short distance on the apical margin of the first segment, and on the 

 apical middle of the second segment another large dark fuscous spot, 

 rather transverse, and connected with the basal spot by a short, narrow, 

 fuscous line down the middle of the segment, both spots are clothed 

 with fuscous pubescence, that on the apical spot the darkest; apical 

 segments above and beneath densely clothed with golden-sericeous pu- 

 bescence. Length -i* — 5 lines. 



Hub. — Cape St. Lucas, Lower California. Two specimens. Mr. H. 

 Ulke. (Coll. Ent. Soc. Philad.) 



6. Mutilla castanea, n. sp. 



Dark chestnut-brown, shining: legs and antennae fulvo-testaceous : wings 

 yellowish-hyaline: three submarginal cells. 



Male. — Uniform dark chestnut-brown, densely and finely punctured, 

 shining, clothed with a thin palish pubescence ; head slightly wider 

 than the thorax, the eyes very large and prominent, entire ; ocelli also 

 very large and prominent, enclosed by a black spot ; face much de- 

 pressed beneath the antenna} ; upper surface of the mandibles broad 

 and concave, outer surface rather densely clothed with short yellowish 

 pubescence; palpi pale luteous ; antennae longer than the head and 

 thorax, fulvo-testaceous, and when viewed sideways they have a scol- 

 loped appearance, the joints beneath being contracted at their sutures. 

 Thorax broad and truncate in front; prothorax closely punctured, de- 

 pressed above and somewhat prominent on each side; mesothorax sub- 

 convex, with large, deep, sparse punctures; on each side over the teguhe 

 a deeply impressed longitudinal line ; scutellum large, with large scat- 

 tered punctures; pleura densely punctured; metathorax quadrate, with 

 scattered punctures, shining, abrupt on the sides and behind, the pos- 

 terior face concave; on the dorsal middle two longitudinal approxi- 

 mated carinae, confluent behind; tegulae smooth and polished, chestnut- 

 brown. Wings pale yellowish-hyaline; nervures fuscous, stigma rather 



