724 EXPLANATION OF THE PLATES. 



FIG. 



15. AHtrunk of Xiphydria. Upper side. 

 16, ■- Lateral view. 



17. Part of trunk and abdomen of Formica, to show the 



squama. Vol. III. p. 389. 3. 



1 8. of Myrmica, to show the no- 

 dus. Vol. III. p. 389. 4. 



19. Alitrunk of Musca. Upper side. a. Alula or winglet. 



20. Metathorax of ditto. 



21. Alitrunk of ditto. Lateral view. 



22. Abdomen of ditto. Venter. 



PLATE. X. a 



N.B. In this plate the red points out the costal, and the 

 yellotv the anal areas, the intermediate being unco- 

 loured. 



1. Elytra, a. Base. b. Shoulder, c. Lateral margin. 



d. Apex. 



2. Tegmina. Blatta. 



3. Hemelytra. Pentatoma. 



4. Wing. Coleoptera. a. An insulated nervure. Vol. III. 



p. 625. 



5. - Dermaptera. 



6. Lepidoptera. 



7. Neuroptera. 



8. Hymenoptera. Tenthredo L. 



9. ■ Bombus. 



10. Under wing. Hymenoptera. 



11. ■ Proctotrupes. 



12. — i — ,— ^— — Diptera. Tipula. 



13. — Psychoda. Vol. III. p. 645. 



14. Musca. a b. Two areolets be- 



tween the costal and mediastinal nervures. c Areolet 

 between the mediastinal and postcostal nervures. 



a Vol. II. p. 347-. III. p. 372—, 595-. 



