HENRY J. FRANKLIN. 253 



First abdominal segment entirely covered above with light or yel- 

 low pile ; second segment not nearly entirely covered with 

 yellow pile alboanalis. 



44. Fourth and fifth abdominal segments both almost or entirely covered 



above with black pile 48. 



Fourth and fifth abdominal segments not both nearly covered with 

 black pile 49. 



45. A touch of yellow pile present on the lateral margins of the third 



abdominal segment niormonorum. 



No touch of yellow pile on lateral margins of third segment. 



separatus. 



46. Disc of thorax with a central, dark, rather bare, shining area ; basal 



middle of second dorsal abdominal segment usually bearing 



brown-ferruginous pile affiuis. 



Dorsum of thorax usually entirely covered with yellow pile ; gener- 

 ally only the first dorsal abdominal segment bearing other 

 than black pile iiupatiens. 



47. A distinct black interalar band present 50. 



No black interalar band present 56. 



48. The first two abdominal segments, and only the first two, entirely 



covered above with yellow pile 50. 



Abdomen not so colored 51. 



49. Apical abdominal segments with ferruginous-red pile above 60. 



Apical abdominal segments without ferruginous-red pile above..62. 



50. Hypopygium with median carina on its apical portion. .pleuralis. 

 Hypopygium without median carina on its apical portion 59. 



51. Ocelli large; well below the supra-orbital line, in the narrowest 



part of the front 52. 



Ocelli small ; near the supra-orbital line 53. 



52. Third dorsal abdominal segment entirely covered with yellow pile. 



auricomus. 

 Third segment not thus covered crotcliii. 



53. Malar space very short, not one-fourth the length of the eye 54. 



Malar space fully one-fourth the length of the eye 55. 



54. Eastern terricola. 



Western, mostly Calif ornian..occiclentalis var. iiigTOSCutatus. 



55. Scutellum usually dark, with very little or no yellow pile (excep- 



tionally, well covered with yellow pile); cosmopolitan. 



pennsylvanicus. 

 Scutellum always well covered with yellow pile ; southwestern. 



sonorus. 



56. Hypopygium with a median carina on its apical portion.. vag'aus. 

 Hypopygium with no median carina biiiiaculatiis, 



57. Black interalar band present fervidus. 



No black interalar band present fervidus var. dorsalis. 



TRANS. AM. ENT. SOC, XXXVIII. 



