WILLIAMS: LARRID^ OF KANSAS. 143 



Males. 



1. Intel-ocular space at vertex not wider than length of antennal joints 



2 and 3; wings clear '-^ 



Interocular space at vertex decidedly wider than the length of an- 

 tennal joints 2 and 3; wings clear to fuscous 3 



2. Disc of propodeum with delicate striae, which diverge from beyond 



the base; third antennal joint one-third shorter than 4. .disHncta 

 Disc of propodeum finely granulate; antennal joints 3 and 4 sub- 

 equal aurentia 



3. Wings clear or nearly so ■* 



Wings fuscous ° 



4. Abdomen entirely, legs and venation largely, dull yellowish brown; 



length, 8 mm tachysphecoides 



Abdomen not entirely red or yellowish brown; venation dark brown 

 or black ^ 



5. Second submarginal cell almost triangular, the first transverse 



cubitus therefore very close to the second on the radius; first 

 recurrent almost interstitial with the first transverse cubitus; 

 a rather distinct sulcation from the anterior ocellus forward; 



abdomen black pxnerugosa 



Venation normal, not as above; sulcation from anterior ocellus in- 

 distinct or wanting 6 



6. Abdomen red and black, rarely entirely red eonferta 



Abdomen black; punctation a little coarser than in eonferta 7 



7. Disc of propodeum with a longitudinal sulcus only on apical half, 



and with some rather indistinct raised lines diverging from the 

 base to the sides nearly to its middle length; punctation of 

 scutum rather coarse and so close as to give it an opaque appear- 

 ance; length, 6 mm minor 



Disc of propodeum with a longitudinal sulcus usually extending its 

 entire leng-th, the diverging lines wanting or very short; puncta- 

 tion of scutum rather fine, the punctures well separated; scutum, 

 therefore, rather shining and smooth; length, 8-11 mm., .bruneri 



8. Antennae distinctly shorter than head and thorax together; basal 



abdominal segments red dwisa 



Antenna as long as head and thorax, or nearly so; at most the 

 second segment red 9 



9. Entirely black; scutum closely but distinctly punctured, therefore 



shining; abdomen also shining and with indistinct apical fasciae 



on segments ". ttis*" 



Second abdominal segment red; scutum so closely punctured as to 

 give it a granulate opaque aspect; no sericeous fasciae on 

 abdomen riigosa 



