. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. TECHNICAL DESCRIPTION OF STAGES. 121 First pupal stage.—Length in the early condition of this stage about 17 mm.; anterior femora, mm.; anterior tibiae, mm.; hind tibise, mm.; width of head, 6 mm. Eye-spots entirely wanting; eye prominences well developed, as in later pupal stages. Wing cases extend to the tip of the third segment. Third antennal joint one- third longer than second, fourth as long as second, others decreasing in length. The anterior tarsi reappear perfectly developed, and are nearl
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. TECHNICAL DESCRIPTION OF STAGES. 121 First pupal stage.—Length in the early condition of this stage about 17 mm.; anterior femora, mm.; anterior tibiae, mm.; hind tibise, mm.; width of head, 6 mm. Eye-spots entirely wanting; eye prominences well developed, as in later pupal stages. Wing cases extend to the tip of the third segment. Third antennal joint one- third longer than second, fourth as long as second, others decreasing in length. The anterior tarsi reappear perfectly developed, and are nearly as long as the tibiae, and are folded along the inner face of the latter; the first joint is very minute, and the second or last very long— longer than the middle or posterior pairs—and armed with two curved claws at the tip, of which one is rather longer than the other. Femoral comb with an additional tooth, a very minute one being distinctly separated from the large blunt upper tooth. The anterior tibiae have within the large blunt subapical tooth, which has occurred all along hitherto, tw^o minute saw-teeth instead of the one present in the pre- ceding stage (fig. 51). The hairs of the legs and bod}^ are arranged as hitherto, but are rather more numerous and longer, and this is particularly true of the anterior limbs. The sexual characters which have been foreshadowed in the two later larval stages are now distmctly defined. Second pupal stage.—This stage does not present any differences from the last except in the greater size of the speci- mens, which is noticeable in the relative dimensions of the parts hitherto measured for comparison. The length of the adult pupa varies from 27 mm. in the case of the males- to about 35 mm. in the case of the larger females. The adult pupa of the male presents the following length of the parts referred to: Anterior femora, mm.; anterior tibiae, mm.; hind tibiae, mm.; width of head, mm. In the case of the fem
Size: 1417px × 1762px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectentomology
