BRAZILIAN MUTILLA. 27 



28. M. ceiitroinaculat» ?.— Length 15 mm.— Form same as in spijuceps, 

 except that the head laterally behind eyes is more straight and not narrowed 

 to the tooth at posterior angles ; when viewed from above, this tooth is slightly 

 divergent and not bent inward as \n spiniceps ; the two teeth beneath on the 

 throat are close together, straight and distant from the tooth on under side of 

 cheeks ; clypeus with a long, narrow, flattened process on apical middle, somewhat 

 as in armafa, but less porrect, and deeply emarginate at apex. 



Color much as in spiniceps; the cheeks, a large rounded spot on each side of 

 head behind eyes and the sides of mesothorax above, clothed with silvery pubes- 

 cence ; the silvery pile on flanks of thorax is more dense and brilliant: calcaria 

 honey-yellow; sides of first segment above, basal sides and lateral apical margin 

 of second and an interrupted band on apex of third segment, clothed with dense 

 silvery pubescence; middle of second segment above with a rather large ovate 

 spot of cupreous pubescence; apical margin of the segments above and beneath 

 fringed with long pale hair, the depressed apical margin of the segments ferru- 

 ginous. 



Paracary (January). One specimen. Closely allied to spiniceps, 

 but amply distinct by the different armature of the head. It also 

 resembles cephalotes in color, but differs in the form of the head and 

 of first segment of abdomen, while the cupreous spot on second seg- 

 ment is much smaller. 



Also closely resembles moneta Gerst., which, however, has no such 

 projection on the clypeus ; the tooth on cheeks beneath longer, and 

 those on the throat shorter and more widely separated ; the posterior 

 angles of the head are acutely produced when viewed from the 

 side ; and the first segment of the abdomen is narrow at apex. In 

 ornamentation moneta has the pale pubescent markings on the abdo- 

 men above almost exactly like those in centromaeiilata, but uniformly 

 golden, while in the latter species they are silvery, except the central 

 spot on second segment which only is golden. 



29. M. Sinithii 9. — Length 15-17 mm. — Head and thorax coarsely, ru- 

 gosely punctured ; head very large, quadrate, truncate behind, posterior angles 

 above rounded, beneath armed with a rather short acute tooth directed forwards ; 

 two small obtuse tubercles between insertion of antennae; eyes small, short 

 ovate, flattened and distinctly netted, placed on the vertex, and leaving nearly 

 as much space between them and the occiput as that between the eyes them- 

 selves, which are unusually wide apart; thorax fiddle-shaped, but broader in 

 front than behind, and strangulated at the middle laterally, the lateral margin 

 in front of the constriction obtusely angular, not dentate; disk of metathorax 

 rounded above, the posterior face slightly concave and smooth, upper margin of 

 flanks coarsely, subobliquely striated, as are also the sides of the thorax ante- 

 riorly; metathoracic spiracles prominent, polished; middle flanks of thorax 

 deeply excavated, smooth and polished ; abdomen short, ovate, the first segment 



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



