. Annals of the Entomological Society of America. Entomology. ANNALS. OF The Entomological Society of America Volume X SEPTEMBER, 19 17 Number 3 OBSERVATIOTVrS ON THE PUPAL WINGS OF NEPTICULA, WITH COMPARATIVE NOTES ON OTHER GENERA. By Annette F. Braun, Cincinnati, Ohio. The Nepticulidas possess some conspicuous characteristics not present in other Lepidoptera. The most noticeable of these are the crowding together and anastomosis of the main tracheal stems of the fore wings and the absence of true cross-veins (except the humeral cross-vein in rare instances). The nearest approach to this type
. Annals of the Entomological Society of America. Entomology. ANNALS. OF The Entomological Society of America Volume X SEPTEMBER, 19 17 Number 3 OBSERVATIOTVrS ON THE PUPAL WINGS OF NEPTICULA, WITH COMPARATIVE NOTES ON OTHER GENERA. By Annette F. Braun, Cincinnati, Ohio. The Nepticulidas possess some conspicuous characteristics not present in other Lepidoptera. The most noticeable of these are the crowding together and anastomosis of the main tracheal stems of the fore wings and the absence of true cross-veins (except the humeral cross-vein in rare instances). The nearest approach to this type of venation seems to be found among certain small Trichoptera; where however the base of media remains distinct and does not anastomose either with radius or cubitus. The presence of a true frenulum in the male in even the most primitive genera of Nepticulidae taken in con- junction with the fact that in the female we find both jugum on the fore wing and series of hooked spines on the costa of the hind wing also suggests their relationship to the Trichoptera. Other characteristics, such as the presence of the jugum in the female of the more primitive genera, the structure of the mouth parts, and the structure of the pupa ally them to the Eriocranid group of the Micropterygidae. It is in the development of the venation of the fore wings that this group differs so strikingly from other Lepidoptera. The disappearance of the basal portion of media takes place through coalescence with the base of radius or with the base of cubitus, and not through atrophy as is usual in the Frenatae. In the hind wing media coalesces with radius to about the middle of the wing in much the same way. This condition is not however unique, as it is occasionally present in other groups 233. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original wor
Size: 2038px × 1227px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectentomology, bookyear1
