92 Rev. T. A. Marshall's monograph of 



(7) 32. Recurrent nervure interstitial, or 



subinterstitial, i.e., falling (but 

 rarely) into the apex of the 1st 

 cubital areolet, or the base of 

 the 2d. 



(34) 33. Terebra as long as the abdomen 



with the metathorax. Smallest 

 species, 1£ lines long . . . . 13. jaculator, Hal. 



(33) 34. Terebra shorter than, seldom as 

 long as, the abdomen. Larger 

 species. 



(38) 35. Stigma fuscous, with or without a 



pale exterior margin. 



(37) 3G. Stigma with a pale margin ; recur- 

 rent nervure $ $ subinterstitial 18. pulchricomis, Wesin. 



(36) 37. Stigma without a pale margin ; re- 

 current nervure J evected, $ 

 subinterstitial or evected .. 19. melanostictiis, Cap., n.s. 



(35) 38. Stigma pale or only slightly in- 



f uscated ; sometimes margined 

 with fuscous. 

 (40) 39. Terebra as long as the abdomen . . 22. consors, Ruthe. 



(39) 40. Terebra as long as J or ~ of the 



abdomen. 

 (42) 41. Antennae blackish ; body blackish, 



with the scutellum and some 



other portions rufous ; tips of 



the tarsi and of the hind tibire 



fuscous . . . . . . . . 20. scutellator, Nces. 



41) 42. Antennre testaceous tipped with 



fuscous ; bodyand legs testaceous, 



only the 1st abdominal segment 



more or less infuscated ; tips of 



the hind tibiae seldom subinfus- 



cated . . . . . . . . 21. uiiicolor, Wesm. 



Section II. Tracheal grooves of the 1st abdominal 

 segment obsolete. 



(2) 1. Wings narrow, hardly longer than 



the abdomen, infumated, with a 



whitish streak beneath the stigma 17. micropterus, Hal. 



(1) 2. Wings fully developed and hyaline, 

 or nearly so. 



(4) 3. First abdominal suture white ; 

 petiole whitish at the base (ex- 

 cept in a var.) . . . , . . 23. versicolor, Wesm. 



(3) 4. First abdominal suture and base of 



the petiole concolorous with the 

 rest of the surface. 

 (12) 5. Stigma fuscous, its inner angle pale. 

 (9) 0. Head broader than the thorax. 



(8) 7. First abscissa of the radius much 



shorter than the second. Terebra 

 shorter than the abdomen. Petiole 

 stout, shorter than the condylus 20. prqflitfator, Hal. 



