Dideoides latus (Coquillett, 1898):322

Dideoides species have face entirely yellow; eye very densely pilose; scutum dark with at most a porrly defined dull yellow pollinose lateral vitta; anterior anepisternum bare; metasternum pilose; metaepisternum bare; vein R4+5 straight or nearly so; and metacoxa with a tuft of pile posteromedially.

Synonyms:

Syrphus formosanus Matsumura, 1911: 140.

Syrphus latus Coquillett, 1898: 322.

New description:

MALE.

Head: Face with facial tubercle, yellow, yellow pilose, withish-yellow pollinose laterally; gena yellow, yellow pilose; frontal triangle yellow, black and yellow pilose; vertical triangle black, black pilose; antenna orangish, black pilose, basoflagellomere oval, darker dorsally; holoptic, eye pilose; occiput black, yellow pollinose, yellow pilose.

Thorax: Scutum black densely yellow pollinose, with central gray pollinose area divided by three black vittae, densely yellow pilose; postpronotum yellow, bare; notopleuron, supra-alar area and postalar callus densely yellow pollinose; scutellum yellow, mainly yellow pilose, black pilose medially, subscutellar fringe complete with yellow pile. Pleuron black, yellow pilose, densely yellow pollinose on proepimeron, meron, katepisternum dorsally, and posterior 1/2 of posterior anepisternum making them look like yellow; metasternum pilose; calypter yellow; plumula yellow; halter yellow; spiracular fringes yellow. Wing: Wing membrane orangish-yellow on anterior margin, hyaline posteriorly, entirely microtrichose. Alula broad, microtrichose. Legs: except coxae and trochanter dark brown, yellow pilose except coxae and metaleg.

Abdomen: oval, terga 2-5 strongly margined. Tergum 1 yellow pilose, tergum 2 mostly yellow pilose, black pilose on posterlaterla 1/4; terga 3-5 mostly black pilose with yellow pile on yellow areas. tergum 1 yellow; tergum 2 yellow with a subbasal, slightly arcuate black fascia, sometime sdivided medially; terga 3 and 4 black with medial, broad, arcuate yellow fascia, and with triangular yellow macula on posterior margin (the one on tergum 4 broader) connected with yellow fascia medially; tergum 5 yellow with narrow black fascia on anterior margin and two oblique black vittae, sometimes connected medially forming an inverted V-shaped macula.

FEMALE.

Very similar to male except frons densely yellow pollinose, only ocellar triangle black.

Dideoides latus (Coquillett, 1898).

Coquillett, D.W. (1898) Report on a collection of Japanese Diptera, presented to the U.S. National Museum by the Imperial University of Tokyo. Proceedings of the United States National Museum 21, 301-340 [= No. 1146].

Dideoides is a member of the tribe Syrphini. Mengual et al. (2008) resolved Dideoides coquilletti as sister group of Eriozona syrphoides, with Dideopsis aegrota as sister group of these two species.

Larvae of D. latus have been reported feeding on Ceratovacuna lanigera, C. nekoashi and Sitobion akebiae (Aphididae) (Mizuno et al. 1997) from Japan.

Species known from China, Taiwan and Japan.