. Bulletin. t in bothsexes of nubilalis is much narrowerthan in penitalis, as shown in Figures30 and 31. In the comparativelengths of the maxillae and antennaethere is but little difference betweennubilalis (Fig. 35) and penitalis, butin obumbratilis the antennae andmaxillae are considerably shorter thanin the other two species. Adult.—This species is the dark-est of the group, the male in par-ticular being very dark. We havefigured the wings of the female (, a). In the male the central bandof fore wings, the base proximad ofthe indented line, and the tip beyondthe submarginal line are u
. Bulletin. t in bothsexes of nubilalis is much narrowerthan in penitalis, as shown in Figures30 and 31. In the comparativelengths of the maxillae and antennaethere is but little difference betweennubilalis (Fig. 35) and penitalis, butin obumbratilis the antennae andmaxillae are considerably shorter thanin the other two species. Adult.—This species is the dark-est of the group, the male in par-ticular being very dark. We havefigured the wings of the female (, a). In the male the central bandof fore wings, the base proximad ofthe indented line, and the tip beyondthe submarginal line are usually darkbrown, leaving only two narrownotched yellow fasciae, one before and the other beyond the hind wings of the male are much darker than those of the female,the only yellow portion being a moderately broad band across middle. >3^ :>- ^ - • -C ?St* 1 i ? »^^^=^ -^ ^ :T^ « ?i . Fig. 39. Wings ot the left side (a)of Pyrausta nubilalis, female,and (ij of P. penitalis, Pig. 40. European corn-borer (Pyrausta nubilalis): a. male hypo-pygium. one side : 6, central process, more enlarged; and c, dor-sal plate. Female penultimate abdominal segment, d. 303 The face is produced but little beyond anterior margin of eyes inprofile, is convex, with an almost imperceptible carina at anterior margin,beyond which it is declivitous. The male hypopygium is as shown inFigure 40, the strong appendiculate thorn above middle of each .clasperbeing very different from the two small thorns present in process at middle of each clasper (Fig. 40,) is more like that ofobumbratilis than that of penitalis. In the specimens before me the sub-marginal line in fore wings is less distinctly dentate posteriorly than inany of the other three species (Fig. 39, a). The Nelum bo-borer{Pyrausta penitalis Grote) Larva.—The dark chitinized points on the skin, which form thecolor pattern on the dorsum and sides of the other two species are notcontinued below the l
Size: 2469px × 1013px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
