28 PEOCEEDINGS OF THE NATIONAL MUSEUM. vol. G3. 



43. Seventh and eighth antennal joints wider than long or about as wide as long. . 44. 

 Seventh and eighth antennal joints longer than wide 47. 



44. First tergite forming a perfect arc above, not angulate sublaterally and not 



declivous on the sides, the striae regularly placed and with no particular ones 

 more prominent than others ; second tergite neither extensively nor strongly 



striate 39. cynipicola (Ashmead). 



First tergite flattened above, angulate sublaterally, declivous on the sides, at 

 least not forming a perfect arc above 45. 



45. Abdomen more than twice as long as wide 40. actinomeridis (Ashmead). 



Abdomen not more than twice as long as wide 46. 



46. Last joint of antenna, viewed laterally, twice as long as wide, conical, the 



apex acute 41. artimesiae (Ashmead). 



Last joint of antenna less than twice as long as wide, the apex not acute. 



42. salicicola (Ashmead). 



47. Abdomen distinctly longer than the head and thorax united. 



43. virginiensis (Ashmead). 

 Abdomen not distinctly longer than the head and thorax united 48. 



48. Wings not extending beyond the apex of the abdomen 49. 



Wings extending distinctly beyond the apex of the abdomen 50. 



49. Tarsi of middle legs distinctly longer than the tibiae... 44. atriplicis (Ashmead). 

 Tarsi of middle legs not distinctly longer than the tibiae 49a. 



49a. Joints eight and nine less than twice aslong as wide . . 45. asynaptae (Ashmead). 

 Joints eight and nine twice as long as wide 46. texana, new species. 



50. First joint of middle tarsi viewed from above about three times as long as wide. 



47. burkei (Rohwer). 

 First joint of middle tarsi four (or a little more) times as long as wide 51. 



51. Fore-wings extending posteriorly half the length of the abdomen past the latter's 



apex 48. hiemalis Forbes. 



Fore-wings not extending so far posteriorly, reaching slightly beyond the apex 

 of the abdomen 52 . 



52. Median area on first tergite with many regularly placed longitudinal carinae. 



49. marylandica, new species. 

 Median area with only one prominent carina 50. eurotiae (Ashmead). 



53. Ninth antennal joint not or only very indistinctly longer than wide 54. 



Ninth antennal joint distinctly longer than wide 56. 



54. Fourth antennal joint much thicker than the pedicel 36. viticola (Ashmead). 



Fourth antennal joint not or very slightly thicker than the pedicel 55. 



55. Abdomen long and narrow, about twice as long as wide; foveae on second tergite 



with a few striae on their inner slopes and with a few striae extending caudad 



from their upper margins 43. virginiensis (Ashmead). 



Abdomen broader, less than twice as long as wide; foveae striate over their 

 entire surface, the striae extending fan-shaped upon the second tergite. 



41. artimesiae (Ashmead). 



56. Fourth antennal joint, measured from points of attachment, about as long as the 



combined lengths of the two joints following it 44. atriplicis (Ashmead). 



Fourth antennal joint much shorter than the two joints following it 57. 



57. Fourth antennal joint sharply produced below at apex 58. 



Fourth antennal joint rounded apically 60. 



58. Second tergite closely and rather strongly striated at base.. 47. burkei (Rohwer). 



Second tergite sparsely and finely striate basally 59. 



59. Abdomen three-fourths as wide as long 48. heimalis Forbes. 



Abdomen three-fifths as wide as long 51. atrae, new species. 



60. Abdomen as wide as the thorax 61. 



.\bdomen distinctly narrower than the thorax 64. 



