Hylaeus in Hawaii


Hylaeus laetus

Islands: Kauai, Oahu, Molokai, Lanai, Maui, Hawaii

Locations: Kauai - (Awaawapuhi Trail, Alakai Swamp Trail, Black Pipe Trail, Iliau Loop, Kokee Rd., Milolii Rd., Mohihi Trail, Nualolo Cliff Trail, Paaiki Valley)
Oahu - (Pahole NAR)
Lanai - (Garden of the Gods, Kahue, Kaiholena Ridge, Lihua, Puu Maua)
Maui - (Kahoma, Lahainaluna)
Hawaii - (Ahumoa, HAVO, Hilina Pali Rd., Humuula Saddle, Kipuka Kalawamana, Kipuka Nene, PTA, Puu Waawaa)

Habitats: Found primarily in both lowland and montane dry shrubland, less commonly in mesic and wet forest.

Plants: Acacia, Bidens, Chamaesyce, Claoxylon, Dodonaea, Dubautia, Metrosideros, Myoporum, Plantago, Santalum, Scaevola, Sesbania, Sida, Sophora, Styphelia

Xerces: No info.

Insects of Hawaii: Medium-sized bees with clear to dark smoky wings. Male face usually with oval yellow mark extending onto paraocu1ar area, or mark on clypeus only, scape slightly dilated and moderately to strongly arched, legs marked with yellow, lateral process of S7 longer than width ofhemisternite; median process of S8 not dilated and with long, narrow tips, apices of gonoforceps subequal to penis valves. Female black with pronotal lobes yellow or unmarked; hair of scutum short. Sister species of H. difficilis; see remarks for that species.

This species occurs in many of the same habitats as H. difficilis, but is more commonly found at lower elevations (below 4000 ft). See remarks for H. difficilis.
Insects of Hawaii Volume 17PDF

UH/DOD: Hylaeus laetus is morphologically similar to the common H. difficilis, but favors middle to lower elevation dry forest and shrubland, avoiding wet forest and coastal habitats altogether. It was not originally considered a target species on Hawaii, since it had previously been quite common, but it was extremely rare throughout the survey (Figure 8). On Hawaii it was found only on the west side of PTA, and only after August. On Oahu it has always been rare, presumably due to the much smaller quantity of habitat available. However, it was still only collected from Pahole, just 700 m from the sole previous collection in 2001. This was despite the expansion of collecting effort with this survey into much more dry forest and shrubland habitat, identical to that of the collection site, throughout both the northern and southern portions of the Waianae range.
Hylaeus near military landsPDF

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