BRAZILIAN MUTILLA. 29 



with pale pubescence ; calcaria black ; base of second ventral segment ferruginous 

 or dark red. 



Chapada. Resembles Smifhii in form, but the armature of the 



head is different, as is also the ornamentation. 



31. M. biicephala Perty (Del. An. Art. Braz., p. 137, pi. 27, fig. 8).— ?.— 

 Length 13 nun. — Head very large, transversely subquadrate, occiput slightly 

 emarginate, almost truncate, hiteral angles rounded, sharply carinate, the carina 

 continued forwards on the cheek beneath, and ending in an acute or subacute, 

 oblique tooth directed forwards beneath base of mandibles; cheeks deeply punc- 

 tured : two longitudinal, subtuberculate carinte between insertion of antennte, 

 immediately beneath which is a tuft of long pale pubescence; mandibles deeply 

 grooved along upper surface: eyes small, ovate, depressed, finely netted, not pol- 

 ished ; thorax very short, broadest in front, then narrowed to base of nietathorax, 

 where it is somewhat constricted, the lateral margin not dentate; nietathorax 

 abruptly declivous and truncate behind, the posterior face flat, smooth and shin- 

 ing; abdomen short, broad ovate, first segment broad, sessile with base of second 

 .segment; pygidium opaque, densely and finely punctured. 



Velvety black above ; cheeks almost nude, having a scattered pale pubescence ; 

 sides of clypeus clothed and fringed with white pubescence ; a broad oblique pale 

 ochraceous stripe behind each eye; scape of antennae with pale pubescence; pos- 

 terior face of metathorax with spar.se erect black hair, a pale ochraceous pubes- 

 cent stripe on each side from spiracles to apex ; mesothorax with a narrow cen- 

 tral ochraceous-yellow stripe on its entire length, sometimes interrupted medi- 

 ally ; flanks of thorax with pale ochraceous pubescence on lower margin, above 

 which midway is a broad, shallow, smooth, polished excavation ; legs black, with 

 sparse black pubescence; calcaria black ; abdomen above velvety black, a spot on 

 apical middle of first segment, sometimes continued on base of second, a stripe on 

 lateral margin of first segment and basal half of second (beneath which the sur- 

 face is smooth and shining), a triangular spot on apical middle of second segment, 

 continued in a narrow stripe to apical segment, and lateral margin of all the seg- 

 ments more or less, all of pale ochraceous pubescence, the central spot on seg- 

 ments 1 and 2 generally ochreous-yellow ; venter shining, thinly clothed with 

 pale pubescence, the segments fringed at apex with pale hair. 



Corumba, Chapada. 



32. M. victura 9-— Length 8-10 mm. — Head large, quadrate, broader than 

 thorax ; occiput emarginate, lateral posterior angles rounded, carinate, the carina 

 extending on cheek beneath and ending in an obtuse compressed tooth below base 

 of mandibles ; cheeks densely punctured ; above insertion of each antenna a promi- 

 nent obtuse tooth or tubercle ; on middle of clypeus two divergent carinaj joined 

 at base and extending to anterior margin ; mandibles with a longitudinal groove on 

 upper margin, which is not toothed ; eyes small, rounded, very convex, smooth, 

 polished ; thorax short, fiddle-shaped, broader anteriorly, strongly constricted 

 at lateral middle, before the constriction are two prominent tubercles, the poste- 

 rior one smaller and acute; metathorax obliquely declivous, the lateral margin 

 coarsely serrate; flanks of thorax smooth, impunctate, broadly and shallowly 

 excavated about the middle; abdomen ovate, first segment broad, not constricted 



TKANS. AM. ENT. SOC, XXVIII. JANUARY, 1902. 



