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Species Pachodynerus nasidens - Keyhole Wasp

Mason of some sort? - Pachodynerus nasidens Wasp - Pachodynerus nasidens - male Wasp - Pachodynerus nasidens Wasp - Pachodynerus nasidens - female Keyhole Wasp? - Pachodynerus nasidens dark Wasp with yellow abdominal bands  - Pachodynerus nasidens Wasp - Pachodynerus nasidens P. nasidens from the toes of Organ Mts - Pachodynerus nasidens - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Vespoidea (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps and allies)
Family Vespidae (Yellowjackets and Hornets, Paper Wasps; Potter, Mason and Pollen Wasps)
Subfamily Eumeninae (Potter and Mason Wasps)
Genus Pachodynerus
Species nasidens (Keyhole Wasp)
Other Common Names
Keyhole Wasp (note: this name may also be applied to various cavity-nesting species of Eumeninae and Trypoxylon)
Explanation of Names
Pachodynerus nasidens (Latreille 1812)
nasidens = from the Latin nāsī ('nose') + dēns ('tooth')
Size
8-12 mm(1)
Identification
Not readily distinguishable from P. pulverulentus, with which it co-occurs in TX & AZ. Separating the two requires comparison of the density of punctation on the second segment of the abdomen (P. nasidens has punctation throughout the segment, decreasing in density towards the anterior, whereas P. pulverulentus has punctation restricted toward the posterior margin).


P. nasidens (left) versus P. pulverulentus (right)
Range
so US (AZ, s. TX, s. FL) to South America; introduced in S. Pacific islands(2)
See Also

Brachygastra mellifica has a much shorter and narrower first gastral segment. Range: c. TX to tropics


Hoplitimyia mutabilis (Syrphidae) - as a fly, has the hind wings modified as halteres. Range: AZ, TX-FL
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.The genus Pachodynerus in North America (Hymenoptera: Vespidae: Eumeninae)
Carpenter J.M. 1986. Proc. Ent. Soc. Wash. 88: 572-577.