Perdita (Xerophasma)
Creators: name: Griswold, Terry
name: Miller, Wensdae
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Andrenidae
Perdita

description: Key to species of Perdita (Xerophasma)   
1 Female........................................................................................................................................................................... 2  
- Male............................................................................................................................................................................ 6  
2 Entirely pallid, cream to tan on head and mesosoma.................................................................................................. 3  
- Dark brown above antennal sockets, dark brown markings on mesoscutum, propodeum........................................... 4  
 3 Ocelli greatly enlarged, ocellar diameter nearly 1/3 width of interocular distance at level of median ocellus (Fig. 4); large (forewing length> 7 mm).............................................................................................. bequaertiana Cockerell   
 - Ocelli moderately enlarged, ocellar diameter approximately 1/5 width of interocular distance at level of median ocellus (Fig. 2); small (forewing length <7mm)........................................................................... pallida Timberlake   
4 Frons dark throughout (Fig. 1, 3); gena narrower than eye in lateral view; mesoscutum either dull or densely punctate................................................................................................................................................................................ 5  
 - Frons with small dark mark above each antennal socket (Fig. 5); gena broader than eye in lateral view; mesoscutum polished and sparsely punctate......................................................................................................... rhondae Griswold   
 5 Mandible without preapical tooth (Fig. 3); clypeus entirely cream-colored; mesoscutum golden brown or dark with 'U' shaped yellow marking, surface shiny, rather densely punctate............................... vespertina Griswold & Miller   
 - Mandible with preapical tooth (Fig. 1); clypeus with medial dark band; mesoscutum entirely dark, surface dull, very sparsely punctate............................................................................................................... ce ladona Griswold & Miller   
 6 Supraclypeal area with conical protuberance and dense tuft of erect, apically bent hair; clypeus densely punctate................................................................................................................................................................ rhondae Griswold   
- Supraclypeal area flat, without tuft of hair; clypeus very impunctate medially.......................................................... 7  
7 Face cream or golden brown above antennal sockets, with little contrast to clypeus and paraocular area; facial fovea distinct, tear-drop shaped, or ellipsoid......................................................................................................................... 8  
 - Face dark brown or black above antennal sockets, in distinct contrast to yellow clypeus and paraocular area; facial fovea indistinct, slightly oval.......................................................................................... celadona Griswold & Miller   
8 Ocelli not greatly enlarged, 1/5 width of interocular distance at level of median ocellus; frons cream to pale yellow above antennal sockets................................................................................................................................................ 9  
 - Ocelli large, 1/3 width of interocular distance at level of median ocellus; frons golden brown above antennal sockets.................................................................................................................................................. bequaertiana Cockerell   
 9 Ocelli not bordered by dark lines except sometimes a single fine line medially between two lateral ocelli; prestigma pale in contrast to dark vein R; stigma without dark posterior margin; facial fovea tear-drop shaped.................................................................................................................................................................................. pallida Timberlake   
 - Dark markings present at least anterior to lateral ocelli, often more extensive in ocellar region; prestigma dark, similar to vein R; stigma with dark posterior margin; facial fovea elongate ellipsoid....... vespertina Griswold & Miller
description: Published as part of Griswold, Terry & Miller, Wensdae, 2010, A Revision of Perdita (Xerophasma) Timberlake (Hymenoptera: Andrenidae), pp. 1-14 in Zootaxa 2517 (1) on page 4, DOI: 10.11646/zootaxa.2517.1.1, http://zenodo.org/record/5302214