1939] 
Mosquitoes of Massachusetts 
131 
Matheson, Robert, 1925. Notes on Chaoborinse (Diptera, Culicidse). 
Can. Ent. 57: 159-160. 
1929. A handbook of the mosquitoes of North America. 268 pp. 
illus. Springfield, 111. and Baltimore, Md. 
Smith, John B., 1904. Report of the New Jersey State Agricultural 
Experiment Station upon the mosquitoes occurring within the 
state, their habits, life history, etc. 482 pp. illus. Trenton. 
Tulloch, George S., 1930. A key to the biting mosquitoes of New Eng- 
land. Psyche 37: 234-244. illus. 
Explanation of Plates 
Plate 4 
1. Female mosquito (after John B. Smith). 
Plate 5 
2. Side view of thorax showing bristle areas. 
3. Dorsal view of crescent-shaped scutellum. 
4. Dorsal view of trilobed scutellum. 
5. Generalized wing of a mosquito. 
6. Tarsus with toothed claws. 
7. Tarsus with simple claws. 
Plate 6 
8. Larva of Aedes (after Marshall). 
9. Larva of Anopheles (after Marshall). 
Plate 7 
10. Head of Anopheles larva (after Marshall). 
11. Dorsal view of segments 4 and 5 of Anopheles larva. 
12. Air tube sharply attenuated without a pecten. 
13. Air tube with some of the pecten teeth produced into long hairs. 
14. Air tube fusiform with small tuft (after Dyar). 
15. Air tube with pecten teeth detached outwardly. 
16. Air tube with pecten teeth not detached outwardly. 
Plate 8 
17. Larva of Ghaol)orus (after Johannsen). 
18. Larva of Mochlonyx (after Johannsen). 
19. Larva of Eucorethra (after Johannsen). 
20. Larva of Corethrella (after Johannsen). 
21. Larva of Dixa (after Johannsen). 
