54 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



38. Second abdominal sternite with a median pit, densely filled with hairs__43. 

 Second abdominal sternite with a median row of short, dense, stiff hairs 



simulating a carina 39. 



39. Pubescence of abdominal tergites caudad of the apical margin of the 



second black 40. 



Pubescence of abdominal tergites caudad of apical margin of the second 

 yellowish to ferruginous 42. 



40. Pubescence of vertex and mesonotum golden yellow asopus (p. 00). 



Pubescence of vertex and mesonotum black 41. 



41. Body entirely ferruginous cassandra (p. 64). 



Head, thorax, and apical abdominal segments black bexar (p. 62). 



42. Body largely ferruginous, the pubescence above mostly golden yellow. 



hector (p. 62). 



Head and thorax entirely black ; abdominal tergites from base of the second 



clothed with ferruginous pubescence waco (p. 03). 



43. Apical abdominal tergites clothed with inconspicuous grayish pubescence ; 



remainder of abdomen black pubescent 44. 



Apical abdominal tergites not clothed with inconspicuous grayish pubescence ; 

 remainder of abdomen not black pubescent 47. 



44. Pronotum with somewhat dense, conspicuous grayish pubescence 45. 



Pronotum with sparse ; inconspicuous blackish pubescence 46. 



45. Integument of abdomen entirely ferruginous; tegulae more or less punctate 



throughout; mesonotum with grayish pubescence monticola (p. 214). 



Integument of abdomen not entirely ferruginous, the apical abdominal seg- 

 ments black ; tegulae glabrous, impunctate except at basal and inner 

 lateral margins; pubescence of mesonotum dark, almost black. 



polia (p. 215). 



46. Head and thorax for the most part black pubescent ; propodeum extraordi- 



narily deeply, foveately reticulate canella (p. 212). 



Head and thorax more or less grayish pubescent ; propodeum shallowly, 

 foveately reticulate macilenta (p. 215). 



47. Last abdominal tergite with a fringe of hairs at the apical margin (the 



fringe usually complete, but sometimes absent medially) 48. 



Last abdominal tergite without an apical fringe of hairs 57. 



48. Head and thorax above clothed with whitish hairs, the abdomen from apex 



of tergite two with pale yellowish hairs magna (p. 232 i. 



Body clothed with red and black, or mostly black pubescence 49. 



49. Abdominal tergites from the apical margin of the second clothed entirely 



with black pubescence 53. 



Abdominal tergites from the apical margin of the second clothed entirely 

 with red or yellow pubescence (sometimes pubescence of apical half of 

 second tergite is red or yellow, and in one species the pubescence of the 

 fourth and fifth tergites is sometimes black) 50. 



50. Dorsum of thorax, and usually vertex, clothed with red pubescence; second 



abdominal tergite with only an apical fringe of red hairs 51. 



Head and thorax clothed entirely with black pubescence ; apical half of 

 second abdominal tergite clothed with red pubescence 52. 



51. Eastern species (Louisiana and eastward) occidentalis (p. 221). 



Western species (Texas and westward) -occidentalis var. comanche (p. 225). 



52. Abdominal sternites with a fringe of long, reddish pubescence at the apical 



margin magnifica (p. 234). 



Abdominal sternites with only a lateral fringe of long, reddish pubescence 

 at the apical margin klugii (p. 229). 



