PLATE XXV. 



Fig. 21. — Mandible of Tachytes distinetus, showing the emargination. 



Fig. 22. — Mandible of Tachytes distinetus, showing the two teeth within. 



Fig. 23. Mandible of Larropsis aurantia. 



Fig. 24. — Mandible of Larra analis, showing two indistinct teeth within. 



Fig. 25. — Mandible of Tachytes obscurus o . Note that the stout 

 mandible is quite narrowly emarginate. 



Fig. 26. — Mandible of Tachytes niergus. Note its slenderness. 



Fig. 27. — Mandible of Tachysphex, showing the deep and rather broad 

 emargination. 



Fig. 28. — Mandible of Niteliopsis foxii o (type) ; A, lower margin. 



Fig. 29. — Joints 2 to 4 of antenna of Niteliopsis foxii o (type). 



Fig. 30. — Antenna of Niteliopsis inerme j- g . 



Fig. 31. — Joints 8 and 9 of antenna of Tachysphex propinquus ^ . 



Fig. 32a. — Joints 2 to 4 of antenna of Tachysphex terminatus o . 



Fig. 32b. — Joints 2 to 4 of antenna of Tachysphex fusus o . 



Fig. 33. — Portion of the inner (posterior) margin of the fore wing of 

 Tachytes distinetus, showing the fold or upturned edge, F, of the wing; 

 AN, anal vein; DN, discoidal vein; SDN, subdiscoidal vein. 



