724 EXPLANATION OF THE PLATES. 
Fig. 
15. Alitrunk of Xiphydria. Upper side. 
16. Lateral view. 
17. Part of trunk and abdomen of Formica, to show the 
squama. Vot. Ill. p. 388. 3. 
18. ——__——_——--—__- of Myrmica, to show the no- 
dus. Vou. Ill. p. 388. 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.* 
N.B. In this plate the red points out the costal, and the 
yellow the anal areas, the intermediate being wunco- 
loured. 
1], Elytra. a. Base. b. Shoulder. c. Lateral margin. 
d. Apex. "7 
2. Tegmina. Blatia. 
3. Hemelytra. Pentatoma. 
4. Wing. Coleoptera. a. An insulated nervure. Vor, III. 
p. 627. 
2. ——— Dermaptera. 
6. ——- Lepidoptera. 
7. ——- Neuroptera. 
8. ——-— Hymenoptera. Tenthredo L. 
9. — ————- Bombus. 
10. Under wing. Hymenoptera. 
Ads —_—_—_-——. Proctotrupes, 
12, ——+ Diptera. Tipula. 
13, ————--——— Psychoda. Vou. III. p. 644. 
14, -- Musca. ab. Two areolets be- 
tween the costal and mediastinal nervures. c. Areolet 
between the mediastinal and_ postcostal nervures. 
* Vou. I. p. 342—. ILL. p. 371—, 593—. 
