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The Ohio Naturalist. 
[Vol. XII, No. 1 
Fig. 21. 
Fig. 22. 
Fig. 23. 
Fig. 24. 
Fig. 25. 
Fig. 26. 
Fig. 27. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Fig. 35. 
Fig. 36. 
Fig. 37. 
Fig. 38. 
EXPLANATION OF PLATE XIX. 
Figures 21-30 Paragus bicolor (Fab.) 
Mature larva x 10; a, antenna; b, anterior spiracle; c, posterior 
respiratory organ. 
A segmental spine of the larva x 40. 
Antero-lateral view of mouth-parts of larva, much enlarged; 
a, outer pair of mouth hooks; b, broad chitinous plates sur- 
rounding the oesophagus; c, antenna; d, upper jaw; e, three 
pairs of lateral mouth-hooks;/, lower jaw. 
Right anterior spiracle highly magnified. 
Dorsal view of posterior respiratory organ x 60; a, the dorsal 
spine; b, one of the radiating spiracles. 
End view of posterior respiratory organ x 70; a, its dorsal spine; 
b, a spiracle; c, the circular plate. 
Dorsal view of puparium x 5; a, posterior respiratory organ; 
b, median segmental spine of sixth larval segment; c, dorsal 
and d, dorso-lateral spines of sixth and seventh larval segments, 
respectively. 
Lateral view of puparium x 5; a, posterior respiratory organ; 
b, median spine; d, dorso-lateral spine; e, lateral spine; /, pos- 
terior ventro-lateral; and g, anterior ventro-lateral. 
Adult male about seven times natural size. 
Front view of head of female x 12. 
Figures 31-38 Paragus tibialis Fallen. 
Posterior part of a young larva from the side greatly enlarged. 
Segmental spine of a full grown larva x 40. 
Dorsal view of posterior respiratory organ of larva x 60; a, the 
dorsal spine; b, one of the paired radiating spiracles. 
End view of posterior respiratory organ x 60; a, its dorsal spine, 
b, a spiracle; c, the circular plate. 
Lateral view of puparium x 5; a, posterior respiratory organ. 
Puparium which has been parasitized by hymenopteron, Bassus 
sp. showing typical form and the irregular hole through which 
the parasite has escaped. 
Outline drawing of adult male from the side x 8. 
Head of female x 12. 
