Chaetonerius Hendel (Neriidae: Diptera) from the East African islands with description of four new species from Madagascar and the Comoros Author Sepúlveda, Tatiana A. Author De Carvalho, Claudio J. B. text Zootaxa 2019 2019-03-14 4567 1 130 146 journal article 28363 10.11646/zootaxa.4567.1.7 72108784-cf25-47ce-a673-422196b39246 1175-5326 2593078 735BA5C8-0721-4DD5-A3C5-185FD93186E3 Key for the identification of Chaetonerius Hendel from the East African islands 1 Occiput lateral and postgena in a right angle on meeting point with occiput posterior ( Fig. 14 ). Face blackish-brown. Proepis- ternum inflated. Fore coxa mostly brown. Palpus brown............................... C . kirkspriggsi sp. n. ( Fig. 16 ). - Occiput lateral and postgena curved on meeting point with occiput posterior. Face mostly to completely yellow. Proepisternum flattened. Fore coxa yellow. Palpus yellow.................................................................. 2 2. Underdeveloped antennal base present ( Figs 11, 12 , indicated by an arrow). Abdomen brown on males and brown with one median longitudinal yellow stripe on females............................................ C. ebejeri sp. n. ( Fig. 17 ). - Antennal base completely absent. Abdomen brown with two median longitudinal yellow stripes....................... 3 3. Mid and hind coxae yellow. Face dark yellow with median sagittal brownish-yellow to blackish-brown stripe ( Fig. 3 ). Katepisternum brown ventrally with dorsal half paler to completely yellow................... C . alluaudi (Giglio-Tos) ( Fig. 18 ). - Mid and/or hind coxae brown. Face dark yellow with no sagittal blackish-brown stripe, at most with a median darkening, not contrasting. Katepisternum completely brown............................................................... 4 4 Thorax dorsally with one median brown V-shaped stripe. Mid and hind coxae brown. Cercus parallel sided with rounded apex, which has very long and thick setae resembling claws ( Fig. 25 )....................... C. madagasikara sp. n. ( Fig. 19 ). - Thorax dorsally with V-shaped brown stripe partially divided medially by one gray pruinose narrow stripe; in some cases, the brown stripe fades posteriorly. Mid coxa partially to completely brown and hind coxa yellow. Cercus narrowing distally with slightly pointed apex and sparse, thin and short setae ( Fig. 24 )............................. C. kotrbae sp. n. ( Fig. 20 ).