BRAZILIAN MUTILLA. 9 



Discal spot on second segment subtriangular and golden ; the apical segments 

 with two silvery stripes; cheeks armed beneath with a stout tooth; 

 posterior angles of head rounded, a silvery pubescent stripe behind 

 each eye 29. SuiiUlii Cress. 



Discal spot on second segment small, longitudinal and silvery; spot on 

 each side of head behind eyes, and spot on each side of third abdomi- 

 nal segment, silvery pubescent; head beneath with two long acute 

 divergent teeth, and a short tooth on cheeks beneath ; posterior angles 

 of checks cariuate and produced into a prominent, compressed, obtuse 

 tooth 30. arniata Klug. 



28. Thorax above with a pale ochraceous pubescent median stripe, sometimes 



interrupted into spots, and a slender pale stripe on each side of 

 metathorax ; head with an oblique pale line behind each eye ; a stripe 

 on lateral margin of second abdominal segment, not reaching apex, 

 and sides of remaining segments, white or pale ochraceous; a pale 

 spot on apical middle of second segment, dilated and more or less tri- 

 angular; cheeks toothed beneath; form robust. 



31 bu<;epliala Perty. 

 Thorax above with sides only — mesothorax narrowly, and metathorax broadly 

 — silvery pubescent; second abdominal segment with a triangular 

 silvery spot on each side at apex; head with a golden stripe behind 

 each eye (sometimes entirely black or golden); cheeks with a small 

 tooth beneath near base of mandibles; frontal tubercles very promi- 

 nent .-.32. victura Cress. 



29. Eyes small, round, convex, polished 30. 



Eyes ovate, depressed, distinctly netted • . . •. 33. 



30. Head quadrate, distance behind eyes long; second segment of abdomen with 



two narrow, elongate spots of pale ochraceous pubescence on disk ; 

 sides of first, lateral margin of second, sides of third and following 

 segments, also two stripes on vertex and on metathorax. also paleotdira- 



ceous or silvery pubescent 33. $j;igaiitea Perty. 



Head small, transverse, distance between tlie eyes short 31. 



31. Mesotliorax twice notched or constricted on each side, with a prominent ob- 



tuse tooth between the constrictions ; anterior angles of thorax with a 

 short obtuse polished tubercle ; head, thorax and abdomen variously 

 ornamented with pale ochraceous or white pubescence. 



34 cerbera Klug. 

 Mesothorax not constricted laterally, unarmed 32. 



32. Thorax with two entire pale pubescent stripes • .36. Oazagiiairei Andre. 



Thorax with only one pale stripe 35. ceiitrovittata Cress. 



Thorax without pale stripes except on sides of metathorax, where they are 



silvery; second segment of abdomen with two long, narrow, oblique 

 silvery white spots of apical half; head silvery white above. 



37. bifiirca Klug. 



33. First segment of abdomen broadly dilated at apex, and conforming in out- 



line with base of -second segment ; head transverse, scarcely broader 

 than thorax, which is short, broad, subquadrate, and not constricted 

 laterally ; abdomen black, with a broad, central bright golden or 

 cupreous pubescent stripe on segments 1-3- . -38. auroplaga Cress. 



TRANS. AM. ENT. SOC, XXVIII. (2) JANUARY, 1902. 



