Toxomerus Macquart, 1855

Borges, Zuleica M. & Couri, Marcia S., 2009, Revision of Toxomerus Macquart, 1855 (Diptera: Syrphidae) from Brazil with synonymic notes, identification key to the species and description of three new species 2179, Zootaxa 2179, pp. 1-72 : 8

Toxomerus Macquart, 1855

Toxomerus Macquart, 1855: 92 , notatus Macquart (original designation) = geminatus Say; Thompson et al., 1976: 47

(catologue); Thompson, 1981: 65 (key); Metz & Thompson, 2001: 225 (revision and key). Mesogramma Loew, 1866: 157 , parvula Loew (original designation); Curran, 1930: 1 (key and new species); 1934: 399

(key and new species); Hull, 1943b: 1 (revision, key and illustrations). Mesograpta Loew, 1872: 114 (nomen nov. Mesogramma ); Osten Sacken, 1878: 125 (synonymy). Mitrosphen Enderlein, 1938: 227 , Syrphus tibicen Wiedemann (original designation); Hull, 1949b: 290 (synonymy). Antiops Enderlein, 1938: 228 , Mesograpta saphiridiceps Bigot (original designation); Hull, 1949b: 290 (synonymy).

Diagnosis. Eye with distinct triangular emargination on posterior margin ( Figs. 1–3); female fronto-orbital plate black on 1/3 superior and yellow on 2/3 inferior; face well developed; gena narrow, with white pollen and piles, short and thick, more abundant inferiorly; arista bare. Pleuron with discreet polinosity, more accentuated on katepisternum; postpronotum bare; proepisternum with few short pile on anterior surface; proepimeron with short pile with very few cilia on 1/3 medial; meron bare; anatergum bare; katatergum bare; posterior spiracle with short pile on margin. Metasternum bare; metaepisternum pilose; metaepimeron bare. Legs with procoxa very short pilose on anterior surface; meso and meta coxae with apical piles on anterior surface; claws yellow on basal half and black on apical half. Wing pilose on margins, with subcostal cell brown; spurious vein with brown spot on medial 1/3. Male genitalia well sclerotized, very short to long postanal process arising from fused surstylar apodemes and projecting caudad between bases of surstyli.