WILLIAMS: LARRID^ OF KANSAS. 159 



2. Sides of propodeum not striate, or at most with striations only 



along either edge ; dorsum of abdomen, all red cla^xonis 



Sides of propodeum distinctly striate for the entire length ; only 

 the tip of the abdomen red 3 



3. Antennae with longer joints, joint 3 nearly three times the length 



of its diameter, and about as long as joint 4 (fig. 32, 6) ; 

 anterior margin of clypeus with a low blunt tooth or lobe, .fusus 

 Antennae with shorter joints, joint 3 about two times as long as 

 its diameter and distinctly shorter than joint 4 (fig. 32, o) ; 

 anterior margin of clypeus without a median lobe or else very 

 slightly produced mesad terminatus 



4. Anterior margin of clypeus with a prominent median tooth (fig. 



67) ; pygidium broad and nearly flat, impunctate or nearly, the 

 bounding carina low, tip broadly rounded (fig. 106) . .deiitatus 

 Anterior margin of clypeus without a median tooth; pygidium 

 usually narrow and more or less punctate 5 



5. Abdomen red or red and black 6 



Abdomen black 16 



6. At least the tibiae and tarsi reddish, femora more or less red; 



punctation of thorax very fine and close 7 



Tibia and femora always black, tarsi more or less so; punctation 

 of thorax fine or coarse 8 



7. Clypeus rounded out for nearly its entire width, a little elevated on 



its anterior edge mesad, where it is shallowly emarginate, no 

 lateral teeth (fig. 73) ; clypeus, sometimes thorax in part, 

 femora and abdomen ferruginous; interocular space at vertex 

 a little wider than the length of antennal joints 2 and 3. 



propinquus 



Clypeus distinctly notched mesad on its anterior edge, the two 



lateral teeth distinct (fig. 66) ; femora largely, and the apex 



of abdomen, ferruginous; interocular space at vertex about 



as wide as the length of antennal joints 2 and 3 belfragei 



8. Anterior margin of clypeus with a distinct median emargination 



or incision, and two lateral teeth (fig. 68) ; upper portion of 

 frons with rather shallow punctures and a finely reticulate 

 surface ; pygidium not at all twice as long as wide . . crenuloides 

 Anterior margin of clypeus without an emargination or with orly 

 a small, shallow one, and with at most one lateral tooth, or 

 without teeth; pygidium longer, from almost two to two and 

 one-half times as long as its basal width 9 



9. Sides of propodeum distinctly though not always deeply striate, 



or striate and punctate combined, shining; scutum frequently 



with close but separate punctures 10 



Sides of propodeum finely granular, subopaque ; scutum very finely 

 and closely punctate, thereby sometimes appearing granulate. .15 



