Rhopus

May 2018
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1 Body color yellow; club usually darker ……..……………………………………… sp. 1
1’ Body color mostly brown …………………………….……………………………….. 2

2(1) Ovipositor not prominent ……………………………………….…………..…. sp. 2
2’ Ovipositor prominent ……..……………………………………………………… sp. 3

Sp. 1 Alameda, Contra Costa, El Dorado, Imperial, Lassen, Marin, Placer, Riverside, San Benito, Santa Barbara, Solano, Sonoma, Tuolumne (RLZC, UCD, UCR, UCSB Arthropod survey)
Sp. 2 Alameda, Contra Costa, Marin (EMEC, RLZC)
Sp. 3 Riverside (UCR)

 

Nearctic species and distribution
americanus (Girault, 1915): USA (DC, DE, OR)
nigroclavatus (Ashmead, 1902): USA (IL, IN, NE, SD, VA)

 

Remarks
I was unable to find the type of R. nigroclavatus in the USNM, but non-type specimens key out to sp.1; however the former is orange, has F1 quadrate and F4 and F5 slightly wider than long, while the latter is yellow, F1 is elongate, and F4 and F5 clearly quadrate.

 

References
Ashmead, W.H. 1902. The hymenopterous parasites of Phenacoccus cavalliae Ckll. Canadian Entomologist 34: 301-302.
Girault, A.A. 1915. New genera of chalcidoid Hymenoptera. Journal of the New York Entomological Society 23: 165-173.