BRAZILIAN MUTILLA. 57 



13. Scutellura flattened, strongly prodnced and deeply emarginate at tip, the 



lateral angles prolonged, incurved and subacute; metathorax with a 

 rather long, obtuse, discal spine; pleura, beneath tegulse, armed on 

 each side with a prominent obtuse tooth ; abdomen beyond first seg- 

 ment dark blue and purple; last ventral segment pale testaceous; 



wings with a beautiful violaceous reflection. U. catinga Cress. 



Scutellura elevated, subpyramidal ; last ventral segment black. 



12. abadia Cress. 



14. TeguliE scabrous; metathorax angular laterally but not spinose, and with a 



small subapical discal tooth 15. sincora Cress. 



Tegulse smooth and shining; metathorax with api'ominent lateral tooth ; no 

 discal tooth 16. pinlia Cress. 



15. First segment of abdomen not constricted at apex, gradually dilated pos- 



teriorly and conforming in outline with base of second segment- • .16. 



First segment short and very broad, anterior face abruptly declivous, the 

 nari'ow upper surface transversely depressed, band-like ; head large, 

 subquadrate, ratherbroader than thorax ; metathorax and first segment 

 of abdomen above densely silvery; the second segment smooth and 

 polished 24. carino Crests. 



First segment small, narrow, nodiform, more or less constricted at apex. . .22. 



16. Sciitellnm fulvous 17. my!$ti4-a Gerst. 



Scutelliini black 17. 



17. Head very liroad and enormously developed, the occii)Ut bioadly and deeply 



emarginate posteriorly, upper angles rounded, lower angles produced 

 into a long olituse tooth ; dypeus deeply transversely excavated. 



18. barboza Cre.ss. 

 Head not broader than thorax 18. 



18. Head and prothorax above with black pubescence 19. 



Heail and prothorax above with pale pubescence; apex of abdominal seg- 

 ments 1 4 above fimbriate with pale pubescence ; small species . . . .21. 



19. Abdomen above, behind second segment, not fasciate with pale pubesence. .20. 

 Abdomen above with a band of silvery-ochraceous juibescence, interrupted on 



middle, on segments 1, 3 and 4 19. alagoa Cress. 



20. Metathorax, pleura, first segment of abdomen and basal margin of second, 



most of venter and legs, rather thickly clothed with white pubescence. 



21. inolaca Cress. 

 Metathorax with some scattered, long, pale hairs; pleura entirely black; 

 apical margin of first segment of abdomen, broadly interrupted me- 

 dially, and a spot on each basal corner of second segment, clothed 

 with white pubescence 20. autliraeina Gerst. 



21. Metathorax above densely covered with a short appressed silvery-white pu- 



bescence 22. coiiiibra Cress. 



Metathorax almost nude, reticulated 23. iiiga Cress. 



22. Second segment of abdomen beneath with a pubescent fovea 23. 



Second segment beneath without a fovea 31. 



23. Second segment of abdomen black, more or less ornamented with pale pubes- 



cence 24. 



Second segment more or less red 34. zapara Cress. 



TRANS. AM. ENT. SOC, XXVIII. (8) JANUARY, 1902. 



