Hylaeus in Hawaii


Hylaeus haleakalae

Islands: Molokai, Maui

Locations: Molokai - (East Kawela Gulch, Kamakou Rd., Kawela Rd., West Kawela Gulch)
Maui - (Makawao FR, Puu Kukui Trail)

Habitats: Montane wet forest

Plants: Cheirodendron, Metrosideros, Scaevola

Xerces: No info.

Insects of Hawaii: Medium-sized bees with smoky wings and punctured terga. Pubescence long all over body, legs mostly black with only traces, if any, of yellow marks, unusual basal area of propodeum deeply reticulately rugose to brow (less so in female). Male with three separate or adjacent facial marks, wide supraclypeal area, and middle of frons with black spot of dense punctures; unusual scape not arched and with long brown hair along median edge; long brown hair on vertex and scutum. Female black and marked only in some females by short yellow stripes in lower paraocular areas.

Fullaway (1918:394) pointed out the probable synonymy of H. neglectus from Molokai and H. haleakalae from Maui, both published simultaneously by Perkins in 1899. The two names are considered here to apply to one species. The name H. haleakalae is chosen because it is based on both sexes. Lacking a male, Perkins described H. neglectus from a single female and compared it to H. laticeps, now known as H. unicus. No mention was made of a relationship with H. haleakalae. It is now reasonable to conclude that H. neglectus is the female of H. haleakalae. Recent collections from the same places on Molokai include males referable to H. haleakalae and females referable to H. neglectus. Males on Maui and Molokai have the distinctive coarse, clathrate (latticed) rugosity described by Perkins for the propodeum of H. haleakalae. Females on both islands have a similar propodeal rugosity less deeply sculpted. The type female of H. neglectus and three other females from Molokai are similar to females of H. haleakalae from Maui, but lack the small facial marks seen in some H. haleakalae. In comparing specimens from Molokai, West Maui, and East Maui, in that order, trends are apparent of increasing facial markings in both sexes, stronger rugae with smoother areolae in the propodeum, and shorter bifurcations of the process of S8.
Insects of Hawaii Volume 17PDF

UH/DOD:
Hylaeus near military landsPDF

Other:

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Images and information mostly from various works by Karl Magnacca.
Questions? e-mail fstarr@hawaii.rr.com
Starr Environmental