Citrogramma pennardsi, Mengual, 2012

Mengual, Ximo, 2012, The flower fly genus Citrogramma Vockeroth (Diptera: Syrphidae): illustrated revision with descriptions of new species, Zoological Journal of the Linnean Society 164 (1), pp. 99-172 : 154-155

CITROGRAMMA PENNARDSI MENGUAL SP. NOV.

Description

Male: Head: Face with facial tubercle, gradually sloping dorsally, more abrupt ventrally, entirely yellow, dark brown pilose with yellow hairs laterally and ventrally, white pollinose laterally; gena yellow, brown pilose, yellow pilose posteriorly; holoptic; lunule yellowish; frontal triangle yellow, black pilose; vertical triangle black, black pilose ( Fig. 9 ); ocelli reddish; antenna dark, black pilose on scape and pedicel; basoflagellomere dark; arista black; occiput black, silver pollinose, white pilose on ventral half, golden-yellow pilose on medial quarter and black pilose dorsally.

Thorax: Scutum black with dorsomedial area uniformly metallic bluish pollinose, with lateral yellow vitta, black pilose except notopleuron yellow pilose on anterior half, densely black pilose on lateral notopleuron and supra-alar area; postpronotum yellow, brownish anteriorly; notopleuron yellow continuing until scutellum, with postalar callus entirely yellow; scutellum yellow with very diffuse dorsomedial triangular brownish macula reaching the posterior margin, black pilose, with complete subscutellar fringe with black hairs. Pleuron mostly yellow, except posterior anepisternum black on anterior half, katepisternum dark with dorsal yellow macula, anepimeron blackish posteriorly, and meron dark, entirely yellow pilose, silver pollinose; metasternum pilose; calypter yellow with yellow and black hairs on margin; plumula yellow; halter yellow; spiracular fringes yellow.

Wing: Wing membrane brownish yellow, entirely microtrichose. Alula microtrichose, broad, broader than cell BM.

Legs: Coxa yellow, trochanter brown, yellow and black pilose; pro- and mesofemur brown, yellow on distal third to half; pro- and mesotibia yellow, black pilose; pro- and mesotarsus black; metaleg dark brown or black, black pilose.

Abdomen: Figure 8 . Parallel-sided; terga 3 and 4 margined. Dorsum mainly black, black pilose dorsally and laterally except tergum 1 yellow pilose laterally and tergum 2 yellow pilose laterally on anterobasal half and medially on yellow maculae; tergum 1 black, yellow laterally; tergum 2 black with two mesolateral round yellow maculae, laterally extending forward to anterolateral tergal margin (like ‘golf club’-shaped spots), yellow lateral margin on anterior third to half; tergum 3 black with anterior sinuate broad yellow fascia (about half of tergum length), with anterior and posterior fascia margins pointed forward medially and fascia not reaching lateral margins; tergum 4 similar, black with yellow fascia reaching lateral margins, with lateral margin yellow on anterior half; tergum 5 similar to tergum 4, black with a sinuate broad yellow fascia but lateral margin yellow on anterior three quarters; sterna yellow, black pilose except sterna 1 and 2 yellow pilose and sternum 3 yellow pilose medially; genital segments yellowish; male genitalia broad modifying posterior margin of sternum 4, cerci large, as in Figures 10 , 147 , and 148.

Female: Unknown.

Variation: Paratype male has pleuron a bit lighter with posterior anepisternum more pollinose making the dark anterior half less evident. The same for anepimeron that looks more yellow because of pollinosity. Lunule of both males is yellow, but it looks darker in the holotype specimen because of the drying process.

Length (N = 2): Body, 10.0–10.2 (10.1) mm; wing, 10.5–10.9 (10.7) mm.

Geographical distribution: Java.

Etymology: This new species is named after Gerard Pennards, a Dutch entomologist and syrphidologist who helped me very much while going through the Leiden Museum collection and sorting syrphids for my studies. He worked very hard with the collection during a special period of time for him because his daughter Amalia Lynn was born in the course of this study. Species epithet to be treated as a noun in apposition.

Differential diagnosis: Species with yellow face, yellow gena, posterior anepisternum partly black, scutellum with a diffuse dark macula, metafemur black and large male genitalia. Very distinct from C. schlingeri although they key together, but C. pennardsi has very large male genitalia and pro- and mesofemur yellow, brown on basal third to half.

Remarks: Species known from only two male individuals collected on the same day at the same locality.

Holotype male deposited in the Nationaal Natuurhistorische Museum ‘Naturalis’ (Leiden, The Netherlands) and labelled: ‘W. Java. Gedeh/Tjibodas 2400 m./Lebak Saät/29.VI.37/M. A. Lieftinck’ ‘Museum Leiden/ Syrphus / gedehanus / de meij./F. Keiser det.’ [third and fourth lines handwritten] ‘ HOLOTYPE / Citrogramma / pennardsi /det. X. Mengual 20 09 ’ [red, second and third lines handwritten].

Type locality: Indonesia: West Java, near Tjibodas, Mount Gedeh, Lebak Saät , 8°15′S, 112°10′E .

Material examined: Type material. Holotype, as above. Paratype. INDONESIA: W. Java, Gedeh Tjibodas , 2400 m, Lebak Saät, 29.vi.1937, M.A. Lieftinck [1♂, RMNH] .

Figures

Figures 3–14. 3, Citrogramma amarilla, frontal view of female head. 4, Citrogramma flavigenum, frontal view of male head. 5–7, Citrogramma bicornutum: 5, frontal view of male head; 6, dorsal view of male head; 7, anterodorsal view of female head. 8–10, Citrogramma pennardsi: 8, dorsal view of male abdomen; 9, dorsal view of male head; 10, ventral view of male genitalia (detail). 11–14, Citrogramma sedlacekorum: 11, dorsal view of female abdomen; 12, dorsal view of male head; 13, dorsal view of female head; 14, dorsal view of male abdomen.

Figures 145–150. Male genitalia. 145, Citrogramma matsumurai, left lateral view. 146, Citrogramma wyatti, left lateral view. 147–148, Citrogramma pennardsi: 147, left lateral view; 148, tergum 9 and surstyli, dorsal view. 149, Citrogramma robertsi, left lateral view. 150, Citrogramma quadratum, left lateral view.