BRAZILIAN MUTILLA. 



"Sao Joao do Monte Negro (Rio Grande do Sul), on the 

 River Cahy, 40 miles north of Porto Alegre. Low land, forest, with 

 numerous clearings. There are open lands two miles south, con- 

 tinuous with the pampas of Uruguay." 



FEMALES. 



The following summary of the more detailed table which follows, 

 will assist in locating the species characterized therein : 



Abdomen crested or tubeiculate at base of second segment Species 1-4. 



Abdomen not so crested or tuberculate 2. 



2. Thorax more or less ferruginous. 



Eyes ovate, depressed. 



Basal segment of abdomen broadly dilated at apex Species 5-16. 



Basal segment quadrate, or nodose, or subnodose at apex. . • .Species 17-20. 



Eyes rounded, very convex Species 21-22. 



Thorax black, generally with pale pubescent markings 3. 



3. Second segment of abdomen with pale pubescent markings 4. 



Second segment with yellow or red smooth or punctured spots 5, 



Second segment with smooth yellow band at apex Species 87-88. 



Second segment with two smooth yellow stripes Species 89-91. 



4. Head unusually large Species 23-32. 



Head not unusually large Species 33-41. 



5. Second segment of abdomen with two red or yellow spots 6. 



Second segment with foxr red or yellow spots 7. 



6. Head large, broader than thorax Species 42-48. 



Head of usual size, not broader than thorax Species 49-61. 



7. Thorax prominently toothed laterally Species 62, 63, 77. 



Thorax not prominently toothed laterally 8. 



8. Thorax black on anterior half, metathorax golden with central black stripe. 



Species 64. 



Thorax black, with central pale pubescent stripe Species 65. 



Thorax with two silvery pubescent stripes, sometimes entire, but generally 

 more or less abbreviated anteriorly Species 66-76, 78-86. 



This last division contains species (or in some cases possibly only 

 varieties of species) which closely resemble each other in general 

 ornamentation, and additional tables to assist in separating them, 

 will be found further on under species Nos. 75 and SQ, 



Table of Species. 



Second segment of abdomen crested or tuberculate at base 2. 



Second segment not crested or tuberculate 5. 



2. Thorax more or less ferruginous or yellowish 3. 



Thorax black 4. 



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



