BRAZILIAN MUTILLA.. 



11 



pubescent ; sides of raetathorax toothed : the two spots on second seg- 

 ment very large, and nearly confluent, blood-red, opaque. 



47. carluigeiia Cress. 

 First segment constricted to a band at apex, before which is a transverse row 



of large acute teeth ; head large, subglobose, posterior angles rounded ; 

 thorax narrowed posteriorly, sides of thorax not toothed ; the two 

 spots on second segment small, round, red, smooth and polished. 



48. Pertyi Dalla Torra. 



43. Second segment of abdomen with longitudinal or oblique interrupted rows of 



carina on upper surface; lateral margin of thorax more or less 



toothed ; form robust *^- 



Second segment above more or less densely and deeply punctured ; lateral 

 margin of thorax unarmed ; form more slender 49. 



44. Apex of abdomen with two silvery pubescent stripes 45. 



Apex of abdomen silvery or golden, with a black median stripe 47. 



45. The two yellowish spots on second segment rounded 46. 



The two yellowish spots narrow transverse ; the two slender silvery stripes 



on thorax above entire or nearly so; form large, robust. 



51. infausta Cress. 



46. Head and thorax black 49. Stygia Smith. 



Head with spot behind each eye, and two stripes on metathorax extending 



for a short distance on mesothorax, silvery pubescent; the two spots 

 on second segment yellow or orange 50. my ops Burm. 



47. The two spots on second segment oblique ; two silvery pubescent stripes on 



head, thorax and basal segment of abdomen 52. belliila Cress. 



The two spots rounded or ovate 48. 



48. The two spots on second segmeut rather small and rounded, yellow ; head 



with silvery pubescent spot behind each eye; spot on each side of 

 mesothorax posteriorlv, and two stripes on metathorax, silvery pubes- 

 cent -^3. larvata Klug. 



The two spots on second segment very large, ovate, orange-red ; head golden 

 between eves and on face; metathorax golden, with a black median 

 stripe....' 54. spiiiosa Swed. 



49. Metathorax above with a short, smooth, transverse carina on disk ; body and 



legs with glittering pubescence, giving the insect a frosty appearance ; 

 the two spots on second segment very large, pale yellow, margined 

 with brown, densely punctured; apical segments silvery pubescent; 



small and rather slender species 55. frigidtila Cress. 



Metathorax without carina on disk above 50. 



50. The two spots on second segment very large, elongate, bright red, reaching 



anterior margin of segment 51. 



The spots on second segment longitudinally ovate, pale yellow; head and 



thorax entirely black ; apical segments with a short median, silvery 



stripe 56. bel I ica Cress. 



The spots on second segment rounded, pale yellow; thorax with two silvery 



pubescent stripes, and apical segments with a median silvery stripe. 



57. dioplitlialnia Klug. 

 The spots on second segment more or less tran verse or oblique; thorax with 



two silvery or pale golden pubescent stripes 52. 



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



