The Journal of microscopy and natural science . vuresin each, a being the cubital point ; hb the anti-cubital trans-verse nervures ; dd and e the radii ; c is the costal nervure ;g in Fig. 4 exhibits well the progress of the obliteration of anervure, being often scarcely traceable through greater partof its length. ,, 5.—Wing venation of Agrion puella. This species exhibits anarrangement of the nervures in the main corresponding withthat of the Odonata generally ; but towards the lower edgethe shape of the cellules and the short, sparse hairs show therelationship to the lacewings, while the st
The Journal of microscopy and natural science . vuresin each, a being the cubital point ; hb the anti-cubital trans-verse nervures ; dd and e the radii ; c is the costal nervure ;g in Fig. 4 exhibits well the progress of the obliteration of anervure, being often scarcely traceable through greater partof its length. ,, 5.—Wing venation of Agrion puella. This species exhibits anarrangement of the nervures in the main corresponding withthat of the Odonata generally ; but towards the lower edgethe shape of the cellules and the short, sparse hairs show therelationship to the lacewings, while the structure towards theapex recalls distinctly the venation of the Trichoptera. ,, 6.—Labium of Gryllus dumesticus, exhibiting the deep centraldivision. It should be observed that this organ is of a fleshycharacter. The drawing is made from the upper or dorsalsurface. Plate 1.—The labium and pal[)i of Hemerobius, seen from beneath.,, 2.—The same organs in tSialis lutaria, seen from above. Journal of Microseopy 3^ Sep. Vol. 6. PI. 1. aa natdel rphiihps. Sc. Journal of Microscopy 3^^ Ser, Vol. 6. Pi. 2journalofmicrosc15post
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