Liriomyza admiranda Spencer

Lonsdale, Owen, 2011, The Liriomyza (Agromyzidae: Schizophora: Diptera) of California 2850, Zootaxa 2850 (1), pp. 1-123 : 20

Liriomyza admiranda Spencer

Figs 19–23

Liriomyza admiranda Spencer 1981: 211 . Spencer & Steyskal 1986: 110.

Wing length 1.3–1.4mm (♂), 1.8mm (♀). Length of ultimate section of vein CuA 1 divided by penultimate section: 3.4–5.9. Eye height divided by gena height: 3.0–3.8. Scutum dusted with greyish pruinosity.

Chaetotaxy: Two ori, two ors. Acrostichal setulae in two rows.

Colouration: Calypter margin and hairs white. Head light yellow with back of head, clypeus and ocellar tubercle brown; posterolateral corner of frons brownish along posterior margin; anterior margin of first flagellomere sometimes appearing darker along anterior margin. Scutum yellow, with dark anteromedial stripe extending past midpoint of scutum, one pair of separate lateromedial stripes (swollen presuturally) and one pair of thinner posterolateral stripes (partially fused to lateromedial stripes in holotype); usually with shorter posteromedial stripe (absent in UCD male) that sometimes fuses to anteromedial stripe; katatergite yellow; anatergite dark below scutellum, and with lateral section paler with posterodorsal corner yellowish. Pleuron pale with anteroventral section of anepisternum dark (excluding corner), anterior half of anepimeron streaked and posterior margin brownish, and ventral 3/4 of meron and katepisternum brown (katepisternal bristle surrounded by yellow). Legs yellow with base of coxae brown, femora with base, dorsal spot at ¾ length and dorsal striation on fore femur brown, and tibiae and tarsi dark brown. Abdominal tergites brown with posterior margin yellow (widest on posterior segments); tergite 2 sometimes with thin medial longitudinal yellow line.

Genitalia: Figs 19–23 . Surstylus bare, with single subapical spine. Basiphallus weakly sclerotized. Paraphallus short, thin, ill-defined posteriorly. Hypophallus thin with reduction of apical hairs. Mesophallus very short, nearly indistinct and fused to distiphallus ventrobasally. Distiphallus pale, cup-shaped, slightly tapered at base, and with nearly indistinct internal spinulose processes. Ejaculatory apodeme relatively broad, marginally pale and with light transverse annulations.

Variation: Modoc County male differs as follows: length of ultimate section of vein CuA 1 divided by penultimate section 2.7; anterior ors inclinate (resembling ori); eye height divided by gena height 4.4; posterolateral region of frons entirely yellow; femora pale distally, with only vestige of spot remaining on fore femur; tibiae and tarsi light brown; tergites 4–6 with two yellow posterior emarginations (deeper on posterior segments); epandrium only brown laterally.

Host. Unknown.

Range. USA. Arizona *, California [Contra Costa*, Inyo*, Modoc*, Riverside, San Diego*, Stanislaus*]. Mexico*.

Type material. Holotype, USA. California: Riverside Co., roadside at Keen Camp summit, 4700’, 23.iv.1977, K.A. Spencer (1♂, USNM).

Additional material examined. MEXICO. Baja Calif., Norte: San Felipe , 7.iii.1963, P.H. Arnaud, Jr. (1♀, CASC) . USA. Arizona: Tucson , 4.v.1942, A.L. Melander (5♂ 1♀, USNM) , California: Contra Costa Co., Russelman Park, Mt. Diablo , 7.v.1960, W.E. Simonds (1♂, CSCA) , Inyo Co., Cartago , 2mi N, 15.vii.1953, E.I. Schlinger (1♀, UCD) , Modoc Co., Cedar Pass Campground , 11.viii.1967, 1800m, P.H. Arnaud, Jr. (1♂, CASC) , San Diego Co., Borrego-Clark L.N. End, 23.iii.1978, Wasbauer, Slansky & Adams (1♂, CSCA) , Stanislaus Co., Frank Raines Co. Park, Del Puerto Canyon , 15.v.1971, Malaise trap, M. Wasbauer (1♀, CSCA) .

Comments. Liriomyza admiranda is externally similar in appearance to L. bella , but the calypter is entirely white (not marginally grey), the notal stripes are separate (not fused), a posteromedial stripe is usually also present on the scutum, male tergites 1–3 are more extensively brown with the remaining tergites brown anteromedially (often yellow in L. bella ) and the female abdomen is brown dorsally (not almost entirely yellow excluding the dark oviscape). This species is much more widespread in western North America than previously known and additional new state and county records likely await discovery.

Figures

FIGURES 19–25. Figs 19–23: Liriomyza admiranda Spencer, male genitalia; 19: holotype phallus, right lateral; 20: ejaculatory apodeme; 21: external components, ventral; 22: phallus, ventral; 23: phallus, left lateral. Figs 24–25: Liriomyza arnaudi Spencer, male holotype genitalia; 24: ventral, with phallus broken off and shown to right (right lateral view with most of basiphallus missing); 25: phallus, ventral, from original figure in Spencer (1981).