Liriomyza stachyos Spencer

Lonsdale, Owen, 2011, The Liriomyza (Agromyzidae: Schizophora: Diptera) of California 2850, Zootaxa 2850 (1), pp. 1-123 : 101

Liriomyza stachyos Spencer

Figs 221–224

Liriomyza stachyos Spencer 1981: 276 . Spencer & Steyskal 1986: 115.

Wing length 1.4–1.9mm (♂), 1.6–2.2mm (♀). Length of ultimate section of vein CuA 1 divided by penultimate section: 2.2–2.4. Eye height divided by gena height: 2.9–4.0. Scutum shining.

Chaetotaxy: Two ori (sometimes three on one side), two ors. Acrostichal setulae in four rows.

Colouration: Calypter margin and hairs greyish-brown. Antenna entirely dark brown; lateral margin of frons dark brown with small spot at base of ori and with extensions from margin surrounding base of ors; ocellar triangle, back of head, ventral margin of gena, face, clypeus, palpus and posterolateral corner of frons (enclosing vertical bristles) dark brown. Scutum with wide lateral yellow stripe presuturally and very narrow yellow stripe above wing base and along posterolateral corner; laterotergites dark brown. Pleuron dark brown with dorsal margin of anepisternum, posterodorsal margin of katepisternum and vertical stripe on katatergite yellow. Legs dark brown with apices of femora narrowly yellow. Abdomen dark brown.

Genitalia: Figs 221–224 . Surstylus small with two subapical spines. Swollen apical section of duct only slightly constricted apically. Paraphallus thin, becoming slightly wider apically. Hypophallus with long apical hairs. Mesophallus indistinct. Distiphallus relatively large, dark, and clavate with complete ventral sulcus and minute apical texturing. Basal bulb on ejaculatory apodeme small with venter pigmented; base of duct lightly pigmented; stem short and thin; blade broad, paler apically excluding dark distal margin.

Hosts. Lamiaceae — Stachys spp. , including S. albens , S. bullata , S. californica and S. rigida . Scrophulariaceae — Castilleja latifolia *.

Range. USA. California [Alameda, Contra Costa, Glenn, Marin, Mendocino*, Monterey*, Napa, Orange *, San Bernardino*, San Francisco, Santa Clara*, Santa Cruz].

Type material. Holotype, USA. California: Santa Cruz Co., Aptos , 14.ix.1948, ex. Stachys californica, Lot 145-1, K.E. Frick, Type No. 13942 (1♂, CASC) ; Paratypes examined, USA. California: Alameda Co., Berkeley , 20.vi.1948, ex. larva Stachys bullata Benth. Lot No. 11-1, K.E. Frick (1♀, CASC) , Alpine Co., Iceberg Meadow , 24.viii.1976, 6400’, H.K. Court (1♂, CASC) , Glenn Co., Plaskett Meadow , 18.vii.1948, sweeping, Lot No. 83-1, Pres. By K.E. Frick, U.N. Lanham (2♂, CASC) , Marin Co., Hwy. 1, 1.7mi NE Muir Beach, 25.iv.1964, P.H. Arnaud, Jr. (1♂, CASC) , San Francisco , 14.vi.1951, E.I. Schlinger (1♂, UCD) , San Mateo Co., Corte Madera Creek, Alpine Road , SE of Portola, 230m, 19.ix.1976, P.H. Arnaud, Jr. (1♂, CASC) , Santa Cruz Co., Aptos , 14.ix.1948, ex. larva Stachys californica Benth., Lot No. 145-1, K.E. Frick (1♀, CASC) , Soquel , 26.viii.1948, sweeping, Lot No. 153-5, K.E. Frick (2♂, CASC) .

Additional material examined. USA. California: Yosemite , 27.vi.1947, A.L. Melander (1♂, CSCA) , Alameda Co., Berkeley, on Stachys, W.W. Jones (1♀, EMEC) , Mendocino Co., UC Hopland Fld. Stn. , nr. H.Q., 880’, 5.v.1968, dry ice Malaise traps, W.J. Turner (1♂, EMEC) , Monterey Co., Ft. Ord: Coast Dunes, 18.v.1977, J. Powell, No 77E117, emerged 8.vi.1977, reared from Castilleja latifolia (1♂, EMEC) , Orange Co., San Clemente , 23.v.1944, A.L. Melander (1♂, USNM) , San Bernardino Co., Barton Flat , 3.viii.1942, A.L. Melander (1♂, USNM; 1♂, CSCA) , Sugarloaf , 15.vii.1946, A.L. Melander (1♀, USNM) , Santa Clara Co., Alum Rock Park , 26.i.1974, J. Powell (1♀, EMEC) .

Comments. Two closely spaced subapical spines on the surstylus, an unusually proportioned ejaculatory apodeme and a heavy, dark, clavate distiphallus with minute apical texturing is diagnostic of Liriomyza stachyos . Externally, it has an entirely dark face, palpus, antenna and legs, with the fore knee yellow.

Figures

FIGURES 218–224. Figs 218–220: Liriomyza specifica, male holotype genitalia; 218: phallus, ventral; 219: ejaculatory apodeme; 220: external components, ventral. Figs 221–224: L. stachyos Spencer, male genitalia; 221: ejaculatory apodeme; 222: phallus, left lateral; 223: phallus, ventral; 224: external components, ventral.