EXPLANATION OF PLATE IV. 



Fig. 20. Labus Sichelianus Sauss., 9. 

 20a. Its head enlarged. 



Fig. 21. Odynerus Otoniitus Sauss., 9 . 



Fig. 22. Odynerus (Stenodynerus) pedestris Sauss. , 9 . 

 22a. Its clypeus enlarged. 



Fig. 23. Odynerus Totonacus Sauss., 9 . 



Fig. 24. Odynerus Zendalus Sauss., 9. 

 24a. Its clypeus enlarged. 



Fig. 25. Odynerus (Stenodynerus) perennis Sauss., 9, 



Fig. 26. Odynerus coyotus Sauss., % . 

 Fig. 27. Odynerus Tacuoayae Sauss., % . 



Fig. 28. Odynerus bacuensis Sauss., % . 



2Sa. Its head % enlarged. 



Fig. 29. Odynerus (Epiponus) dilectus Sauss., % . 

 29a. Its clypeus £ enlarged. 



Fig. 30. Odynerus (Epiponus) denticulatus Sauss., % 



30a. Its clypeus % enlarged. 



7 ig. 31. Pterochilus mexicanus Sauss., 9. 

 31a. Its clypeus 9 enlarged. 



( 392 ) 



