a Genus of Dipterous Insects. 313 
EXPLANATION OF TAB. IX. 
1. Diopsis Ichneumonea, after Linneus. 
2. D. collaris. 
3. D. pallida. 
4. D. apicalis, after Dalman. 
5. D. tenuipes. 
6. D. indica, after Donovan. 
8. D. assimilis (supposed d and ?). 
9. D. fumipennis. 
10,11. D. signata (supposed d and ?), after Dalman. 
12,13. D. fasciata (supposed d and ?). 
14. D. macrophthalma, after Dalman. 
15. D. thoracica. 
16. D. obscura. 
17. D. Dalmanni, after Wiedemann. 
18,19. D. Sykesii (supposed d and *). 
20. D. brevicornis, after Say. 
a—g. Details from D. Sykesii. 
a. The mouth partly concealed in the oral cavity. 
b. Fhe mouth fully porrected. 
c. The acute maxilla and its palpus, seen laterally. 
d. The palpus seen in front. 
e. The labrum. 
f. The tongue. 
g. The antenna. 
N.B. The lines near the figures indicate the natural length and the expansion of the wings. 
