EXPLANATION OF PLATE IV. 



All the figures enlarged unless otherwise stated^ the hair-lines indicating the natural sizes, 



FiQ. 1. — Egg-pod of Caloptenus differentialis, with the mouth torn open, exposing the 

 newly hatched larva of Epicauta viitata (1 a) eating into an egg, and the 

 passage which it made through the mucous covering — natural size. 



Fig. 2. — ^Dorsal view of the First larva, or triungulin, of E. viitata ; 2 a, one side of the 

 head of same from beneath, greatly enlarged, so as to show the mouth- 

 parts ; 2 h, terminal joint of maxillary palpus, showing imbrications and 

 flattened inner surface armed with stout points; 2c, leg, showing more 

 plainly the tarsal spines; 2e, labrum; 2d, one of the abdominal joints, 

 from above, showing stent points, stigmata, and arrangement of spinous 

 hairs. 



Fig. 3. — ^Eggs of E. vittatay the natural size indicated at side. 



Fig. 4. — Dorsal view of the Carabidoid stage of the Second Larva of E. vittata ; 4 a, its 

 antenna ; 4 6, its right maxilla ; 4 c, its leg ; 4 d, side view of the larva, 

 showing its natural position within the locust-egg mass. 



Fig. 5. — Lateral view of the Ultimate or full-grown stage of the Second Larva of 

 E. vittata ; 5 a, portion of the dorsal skin, showing short setaceous hairs. 



Fig. 6. — Third head, or that from the Scarabseidoid stage of the Second Larva of 

 E. vittata, from beneath, showing the reduction of mouth-parts as com- 

 pared with the first head (2 a); 6 a, antenna of same ; 6 &, maxilla of same ; 

 6 c, mandible of same. 



Fig. 7. — Fourth head, or that of the full-grown larva of E. vittata, from above; 7 a, leg 

 of same ; 7 6, the breast-plate or prosternal corneous piece. 



Fig. 8. — Lateral view of the pseudo-pupa or Coarctate Larva of E. vittata^ with the 

 partially shed skin adhering behind ; 8 a, dorsal view of same; 8 1), its head, 

 from the front ; 8 c, same, from side ; 8 d, tuberculous leg ; 8 e, raised spi- 

 racle ; 8/, anal part of same. 



Fig. 9. — Lateral view of the true pupa of Epicauta dnerea Forst. ; 9 a, ventral view of 

 same. 



Fig. 10. — Epicauta vittata (lemniscata or trivittate var.). 



Fig. 11. — Epicauta dnerea Forst. {=marginata Fabr.). 



Fig. 12.— Antenna of the triungulin of Epicauta pennsylvanica ; 12a, maxilla of same; 

 12 6, labial palpus of same. 



Fig. 13. — ^ Hornia minutipennis, dorsal view; 13a, lateral view of same; 13 J, simple 

 claw of same ; 13 c, Coarctate Larva ; 13 d, leg of Ultimate stage of Second 

 Larva 



