1865.] Ill 



cm each side behind the middle two rather large, obtuse tubercles, the 

 posterior ones placed on the lateral base of the metathorax, which is 

 narrowed towards the tip, convex and gradually sloped behind, the sides 

 abrupt and densely pubescent. Legs piceous-black, densely clothed 

 with ochraceous pubescence, very long on the femora ; the tibiae with 

 a row of long acute black spines. Abdomen ovate, convex ; first seg- 

 ment small, companulate, black, densely clothed with long and short 

 ochraceous pubescence; second segment large, rufous, roughly and con- 

 fluently punctured, the basal half above with a large black mark, densely 

 clothed with black pubescence, with the posterior margin lobed on the 

 middle, rest of the segment clothed with short ochraceous pubescence, 

 and on the apical margin a band of dense ochraceous pubescence, some- 

 times with a transverse patch of black pubescence on each side of the 

 middle ; third segment densely clothed with ochraceous pubescence, 

 with a slight mixture of black on the basal middle ; remaining segments 

 densely clothed with black pubescence. Length 6 — 7 lines. 

 Collection. — Ent. Soc. Philad. Three specimens. 



Mutilla rubriceps. n. sp. 



Dull rufous; thorax and three large spots on apex of second abdominal seg- 

 ment, black ; apex of metathorax, legs, the first, sides of the second and all of 

 the remaining segments of abdomen, densely clothed with ochraceous pube- 

 scence. 



Female. — Head dull rufous, densely punctured, and clothed with 

 pale ochraceous pubescence; mandibles, palpi and antenna? piceous or 

 rufo-piceous, the latter proportioned as in the preceding species. Tho- 

 rax deeply and coarsely punctured, especially on the sides, convex 

 above, deep black, clothed with short, dense, black pubescence; on each 

 side before the middle a small, flattened tubercle, and behind the middle 

 a large obtuse, rufous tubercle tipped with black ; the pleura beneath 

 and the metathorax behind densely clothed with a short, fine, appressed. 

 pale ochraceous, sericeous pubescence. Legs piceous, densely clothed 

 with pale ochraceous pubescence ; tibiae with a row of stout, acute 

 spines. Abdomen ovate, convex above; basal segment small, quadrate, 

 punctured, clothed with dense, pale ochraceous, silky pubescence ; se- 

 cond segment large, dull rufous, tinged with brown, densely, deeply 

 and confluently punctured, clothed with ochraceous pubescence, espe- 

 cially on the extreme sides and on the sides of the apical margin where 

 it is very dense and appressed ; on the apical middle of this segment a 

 large black spot, clothed with black pubescence, and on each extreme 

 side another blackish spot, bordered behind with the ochraceous mar- 

 gin ; remaining segments piceous or rufo-piceous, densely clothed, 



