PLATE XXVIII. 



{Figs. 78-81 with tiie finer hairs omitted.) 



Fig. 78. — Fore tarsus of Larropsis o , showing the fossorial comb 

 of moderate bristles. 



Fig. 79. — Fore tarsus of Tachytes distinctus ^ o . The o has the 

 fossorial comb much better developed. 



Fig. 80. — Fore tarsus of Notogonia argentata o . Note the weak 

 comb; the insect works more often in heavy soil. 



Fig. 81. — Fore tarsus of Tachysphex propinquiis o . The long, flexi- 

 ble spines work to advantage in a sandy country. 



Fig. 82. — Hind tibia of Tachytes abdonnnalis g , showing a row of 

 stout, blunt thorns on outer side. 



Fig. 8.3. — Ventral view of femur of Tachytes distinctus ^ , showing 

 emargination. 



Fig. 84. — Lateral view of fore femur of Larropsis ater j , showing 

 emargination near base. Note the inner tooth; tr, trochanter. 



Fig. 85. — Lateral view of portion of fore femur of Tachytes dis- 

 tinctus ^ . 



Fig. 86. — Two views of hind femur of Bothy nostethiis distinctus, shov/- 

 ing apical thickening. 



Fig. 87. — Lateral view of fore femur of Tachysphex tarsatus ^ . 



Fig. 88. — Antennal cleaner of Notogonia argentata; tb, tibia; s, modi- 

 fied spur; tar, tarsus with fringed emargination. 



Fig. 89. — Antennal cleaner of Astata sp., one of the Nyssonidse, show- 

 ing the furcation of the modified tibial spur, a character not found in 

 the Larridae. 



