Syrphophagus

February 2017

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1 Mid tibia completely yellow ……………………………..…………………….…….…. 2
1’ Mid tibia at least partly darkened …………………..………………….…………………. 5
 

2(1) Fore coxa and mid femora yellow …………….…………….………………….. sp. 8
2’ Fore coxa and mid femora dark …………………………………………………..…..  3
 

3(2) All funicle segments longer than wide ……………………………….………. sp. 11
3’ Some funicle segments quadrate or wider than long …………………….…..…….… 4
 

4(3) Scutellum not longitudinally reticulate centrally ……………….……………… sp. 1
4’ Scutellum longitudinally reticulate ………………………………….……………  sp. 4
 

5(1) All funicle segments longer than wide …….…………………….…………..… sp. 2
5’ Some funicle segments quadrate or wider than long …………………….……..….… 6
 

6(5) F2-F4 width greater than length …………………………..………………….……….. 7
6’ F2-4 quadrate or length greater than width …………………………………….…….. 8
 

7(6) F1 quadrate, F6 lighter than other funicle segments, fore coxa dark …………… sp. 5
7’ F1 wider than long, F6 concolorous with rest of funicle segments, fore coxa yellow .. sp. 10
 

8(6) F1-F4 length greater than width, F5-F6 quadrate ……………………….….……  9
8’ Antenna otherwise …………………………………….………….….…….…… 10
 

9(8) Funicle brown, lighter apically; club obliquely truncate; mid tibia with dark markings exceeding midpoint ……………………………………………………..……….. sp. 9
9’ Funicle uniformly dark yellow; club apically rounded; mid tibia with dark ring restricted to basal third ………………………………………………………………..……… sp. 11
 

10(8) Scutellum flattened, sculpture very shallow ……………………….…………… sp. 3
10’ Scutellum convex, deeply sculptured ………………………………….………………. 11
 

11(10) Speculum reduced, ovipositor distinctly protruding ……………………………. smithi
11’ Speculum distinct, ovipositor not obvious ………………….…..……………….… 12
 

12(11) F1 quadrate, equal to F2 ………………………..………..…………… aphidivorus
12’ F1 slightly longer than wide, longer than F2 ……..………..…………….………….. sp. 7
 

Sp. 1 Alameda, Contra Costa, Los Angeles, San Benito (EMEC, RLZC)
Sp. 2 Nevada, (SBNHM), Tuolumne (UCFC)
Sp. 3 Alameda, Marin (RLZC), Placer (UCRC), El Dorado (UCDC)
Sp. 4 Orange, Solano (UCDC)
Sp. 5 Marin (RLZC)
Sp. 6 Napa (UCDC)
Sp. 7 Los Angeles, Modoc, San Bernardino, Stanislaus (CAS, RLZC, UCFC. UCRC)
Sp. 8 El Dorado (UCDC), Tuolumne (UCFC),
Sp. 9 Kern (RLZC)
Sp. 10 Sonoma (CSCA)
Sp. 11 Kern (RLZC)

 

Described Nearctic species and distribution

aphidivorus (Mayr, 1876): USA (CA, CN, FL, ID, IN, KY, LA, ME, NJ, NM, NY, OH, OK, PE, SC, TX, VA)
lachni (Ashmead,  1885): USA (FL)
marilandicus (Girault, 1917): USA (MD)
quadrimaculatae (Ashmead, 1881): USA (FL, LA, MS, NC, SC)
smithi Kamal, 1926: USA (CA)

 
Remarks

Sanderson (1901) reported a “Syrphophophagus flavipes Ashm.” from Delaware, but this is an unavailable name.

 
References

Ashmead, W.H. 1881. On two new chalcid flies from Florida, parasitic upon the larvae of syrphus flies. The Canadian Entomologist 13: 170-172.
Ashmead, W. H. 1885. Studies on the North American Chalcididae, with descriptions of new species from Florida. Transactions of the American Entomological Society 12: x-xix.
Girault, A.A. 1917. New chalcid flies from Maryland, II (Hym). Entomological News 28: 255-258.
Kamal, M. 1926. Four new species of parasites from aphidophagous Syrphidae (Hymenoptera). Canadian Entomologist 58: 283-286.
Mayr, G. 1876. Die europaïschen Encyrtiden. Verhandlungen der Zoologisch-Botanischen Gesellschaft in Wien 25: 675-778.
Sanderson, E.D. 1901. Report of the entomologist. Annual report of the Delaware College Agricultural Experiment Station 12: 259 pp.