ID requests for July 1 - July 14


Mission, Texas

Xylocopa tabaniformis parkinsoniae?

Family:  Apidae

Size:  20 mm  (male & female )

Associated plant at NBC:  


(Hamelia patens)
Family:  Rubiaceae

When seen:  June 2019  

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Male bee

Megachile (Megachile) montivaga?

Family:  Megachilidae

Size:  12 mm (female)

Associated plant at NBC:  

Yellow prickly poppy
(Argemone aenea)

Plant family:  Papaveraceae 

When seen: June 2019  

Silver-tailed petalcutter

Megachile (Megachile) montivaga

Family:  Megachilidae

Size:  12 mm  (female)

This looks like a female Megachile montivaga, a species we've encountered in New York feeding on evening primrose.  The jaws in particular seem distinctive. This bee was found collecting pollen from prickly poppy (Argemone aenea).  We were surprised to find that this species has been recorded on Argemone.  Both local Oenothera and golden Argemone have delicate yellow petals -- we've read this species lines its nest with flower petals -- maybe the thin petals of Argemone are easy to trim?

Female bee

Female bee inside prickly poppy

Could this be M. sidaleae?  It seems to fit Mitchell's description of the species (called M. abducta in "New Species of Megachile" Transactions of the American Entomological Society, Vol. 52, No. 2 (Jun.,1926), pp. 111-118 at 111.)

The bottom segments of this bee's middle and hind legs are pale, and the back of each front-leg tibia is rimmed with a yellow line, a trait which, according to Bug Guide, is associated with the subgenus Pseudocenton ( The bee has very little orange coloring on its forelegs (unlike M. zaptlanta andpolicaris, the other male leafcutters with modified forelegs we've found at NBC).  The pale bands on the bee's abdomen appear boldly defined to the naked eye. The bee's face is hairy -- even its unusual are partly covered with white hairs.

Male bee negotiating tenaza tree blossoms

Diadasia (Diadasia) enavata?

Family:  Apidae

Size:  13 mm  (female)

Associated plant at NBC:  
Common sunflower

(Helianthus annuus)

Plant family:   Asteraceae

When seen: 
June 2019  

Diadasia enavata chimney bee - (c) Copyright 2019 Paula Sharp

A female sunflower chimney bee (Diadasia enavata)

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Last updated August 2020