332 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



dots. Ovipositor sheath slightly shorter than width at base; thorax 

 3.0-3.1 times an long as sheath; apical part of ovipositor wide lanceolate 

 with blunt tip, tip with minute dorsal hook. Postpedicel shorter, 1.1 

 times as long as wide in male, longer (1.4-1.5 times) in female. Eyes 

 1.5-1.7 times as high as wide. Dorsocentral bristles inserted in posterior 

 fourth of distance between suture and supra-alar bristles. Maxillary 

 palpi broad oval with very short bristles and widely rounded apex. 4.5- 

 4.9 mm. Argentina cT 9 punctata, new species (p. 390) 



13. Pleura with the usual three black spots: one on sternopleuron, one above hind 



coxa, and one on inferior portion of the pleurotergites 14 



— Pleura with two black spots, one of these on inferior portion of pleurotergites . 19 



— Pleura with only one black spot, above hind coxa. 



c? 9 costalimai Blanchard (MS.), new species (p. 344) 



14. Apical fourth of midtibia brownish, compressed and dorsoventrally dilated, 



with a dorsal bunch of short and strong black bristles (as in pseudopenicil- 

 lata). Upper margin of sternopleuron with black border. 3.5 mm. 

 Peru c? penicillata Hendel 



— Legs without exceptional armature 15 



15. Frons with two conspicuous broad testaceous yellow vittae between densely 



whitish pruinose narrower vittae. as in pseudopenicillata and tripunctata. 

 Mesonotum densely whitish dusted, conspicuously marked with three 

 equally wide, golden to reddish brown, dusted vittae, one median and 

 two laterals on dorsocentral line. Eyes in profile high, 2.1 times as high 

 as wide. Third to fifth abdominal tergites of male each with a pair of 

 lateral black spots. Mediotergite in some specimens partly black. 4.5- 

 5.5 mm. Brazil: Mato Grosso, Sao Paulo; Argentina. 



cT 9 trivittata (Lutz and Lima) (p. 405) 



— Frons without conspicuous vittae. Mesonotum without broad and conspic- 



uous reddish brown dusted vittae (except in heringi which has three 

 linear bright golden-yellow dusted vittae) 16 



16. Maxillary palpi almost as broad-oval as in punctata, with very short marginal 



bristles and with apex widely rounded. Third to fourth abdominal 

 tergites of female each with a pair of roundish black spots, second tergite 

 with a more widely spaced pair of pointlike small black dots; fifth and 

 sixth tergites entirely spotless. Ovipositor sheath shorter than breadth 

 at base; thorax 3.6 times as long as sheath. 4.2 mm. Brazil: Sao Paulo. 



9 ovalipalpLs, new species (p. 374) 



— Maxillary palpi curved, sickle-shaped, with longer marginal bristles. Fifth 



abdominal tergite in both sexes and sixth tergite of female each with a 

 pair of lateral black spots, which mav be absent on the sixth tergite in 

 reimoseri. Second tergite with a pair of lateral black spots in henngi and 

 pleuralis 17 



17. Only upper mesopleural bristle present. Sternopleuron sometimes almost 



entirely black, mesopleuron shining. Dorsocentral bristle pair inserted 

 in anterior fourth of distance between suture and supra-alar bristles. 

 Third to fifth adbominal tergites of male and second to sixth of female 

 each with a pair of lateral black spots. Mesonotum covered with pale 

 brass-yellow dusting, without pruinose or structural vittae of different 

 color. Fifth tergite of male 1.7 times as long as fourth. Ovipositor 

 sheath slightly shorter than breadth at base; thorax 2.7-2.8 times ts 

 long as sheath. 3.0-3.8 mm. Ecuador; Peru; Argentina. 



cf 9 pleuralis Hendel (p. 381) 



