Encarsia (Hymenoptera: Aphelinidae) parasitoids of Bemisia species in Taiwan (Hemiptera: Aleyrodidae) Author Shih, Yuan-Tung Author Ko, Chiun-Cheng Author Polaszek, Andrew text Journal of Natural History 2008 2008-12-31 42 47 - 48 2923 2941 http://dx.doi.org/10.1080/00222930802372482 journal article 10.1080/00222930802372482 1464-5262 5224449 Encarsia guangxingana Shih, Ko and Polaszek sp. nov. ( Figure 1 ) Description – female Colour . Head yellow except stemmaticum pale brown. Antenna yellow, progressively darker towards F6; F4 intermediate between F1 and F6. Gaster pale yellow except T1–T3, and central T4, dark brown in striking contrast to the remainder of the body. Fore wings hyaline, lightly infuscated below marginal vein. Remainder of body, including legs, pale yellow. Morphology . Stemmaticum with rugose-reticulate surface sculpture ( Figure 1A ). Antennal formula 1-1-4-2, but could be interpreted as 1-1-3-3 ( Figure 1B ). Pedicel very slightly shorter than F1. F1 1.7 times as long as its maximum width, approximately equal in length to F2 and F3. Flagellum with the following numbers of longitudinal sensilla: F1: 3, F2: 1–2, F3: 2–3, F4: 3, F5: 3, F6: 3. Flagellomeres with long setae – setae on F2 as long as the width of F2. Eyes with long setae – each seta about the length of two adjacent ommatidia. Mid-lobe of mesoscutum with 11 or 12 setae ( Figure 1C ). Side lobes with three to five setae. Scutellar sensilla distantly placed. Distance between anterior pair of scutellar setae slightly greater than that between posterior pair. Fore wing ( Figure 1F ) 2.6 times as long as width of disc. Marginal fringe 0.26 times as long as width of disc. Submarginal vein with two setae, marginal vein anteriorly with nine setae. Basal cell with two to four setae. Tarsal formula 5-5-5. Apical spur of mid tibia very long, almost as long as corresponding basitarsus. Tergites laterally with the following numbers of setae: T1: 0, T2: 1, T3: 1, T4: 1, T5: 3, T6: 2, T7: 4. Ovipositor equal in length to mid-tibia. Third valvula 0.39 times as long as second valvifer. Description– male Colour . Body entirely brown to dark brown except the following are pale: side lobe of mesoscutum, propodeum and flagellum of antenna. Legs pale yellow except femur and tibia anteriorly of hind leg. Fore wings lightly infuscated below marginal vein. Morphology . As for female except antennal and genitalia characters. Species group placement Unplaced. Figure 1. Encarsia guangxingana Shih, Ko and Polaszek , sp. nov. Female: (A) posterior head; (B) antenna; (C) mesosoma; (D) mid-leg; (E) ovipositor; (F) fore wing. Distribution Taiwan : Guangxing. Host Hemiptera : Aleyrodidae : Bemisia giffardi . Holotype ♀ , Taiwan : Sindian, Guangxing, 8 August 2005 , Y.T. Shih, ex Bemisia giffardi on Citrus grandis (NTU) . Paratypes 3 ♀ , 2 „ , same data as holotype ( NHM , NTU ) . Remarks The colour of the female is unusual for Old World Encarsia , the dark central spot on the gaster being reminiscent of New World species of the citrella -group. The setation of the head and antennae in the female is also unusual, as is the presence of three longitudinal sensilla on F1. In the key by Huang and Polaszek (1998) E. guangxingana keys to E. bennetti from which it differs in overall colour, the degree of infuscation under the marginal vein, and much of the morphology. Encarsia guangxingana is an unusual and very distinctive species. It is possible that this is the species identified as E. bennetti by Chou et al. (1999) , but this requires confirmation.