344 coyopiD^. 



Conops is one of the earliest founded genera in Diptera, and is 

 soon recognised by the collector by its wasp-like appearance, its 

 long, rigid proboscis and antennae, and its peculiar venation. The 

 species are of moderate size or even comparatively large. They 

 usually exhibit a brown or black ground-colour marked with 

 yellow or reddish spots and bands. The adult flies occur on 

 flowers and in sunny spots, and are generally distributed. The 

 species are sometimes closely allied and diflicult satisfactorilj^ to 

 tabulate, and some little knowledge of the family is required to 

 identify them with certainty. 



2\ible of Species. 



1. Wings quite clear claripennis, sp. n., 



Wino-s never clear 2. [p. 3-io. 



2. («) Thorax and abdomen wholly black ; at 



most traces of whitish stripes on an- 

 terior margin of former, and humeri 



pale {erythrocejphahis) ; or with 



golden - grey pubescent abdominal 



bands {pactyns) ; or with hind margins 



of 2nd and 3rd abdominal segments 



grey-dusted 3. 



{h) Thorax wholly orange-brown, abdomen 



entirely black with obvious black 



pubescence, much more conspicuous [p. 346. 



than is usual in Conops nigriventris, sp. u., 



(c) Thorax and abdomen having the faciea 



normal to Conops ; ground-colour 



mainly brown or orange (mainly 



black in nnnulosus), with yellowish, 



whitish or bhickish markings 4. 



3. («) Wings abnormally broad, wholly black : 



body violet-black; abdomen barely 



narrowed at base ; pulvilli and claws [p. 347. 



orange erythrocephcdus , F., 



{b) "Wings of normal width, dark grey; 



body dull black ; abdomen much 



narrowed (for that of a Conops) just 



beyond base ; pulvilli and claws black ; 



2nd and 3rd abdominal segments grey- [p. 348. 



dusted sepidchralis, Bruu., 



(c) Wings of normal width, grey with 



anterior half much darker ; abdomen 



with golden-gre}' dust-bands on hind 



margins of 1 st and 2nd segments in 



S and 5 > and also on 3rd and 4th 



in c5' pactyas, Walk., p, 349, 



4. Thorax with 3 stripes omatus, Big., p. 350. 



Thorax never striped 5. 



5. A pair of black dots on frons at the level of 



the anteimaj 6. 



Such spots always absent 7. 



