3. ANTHRAX 



521 



6 (5) Wings with the foreniarginal browning at least including the upper 

 basal cell. 



Small species, occurring on heathy commons. Male with five 

 distinct pale abdominal bands. 



4 circaindatus. 



Some other species allied to A . rani sens which may have occurred in England are 

 mentioned after the description of that species, one of which (^.^ay«s) is larger, 

 while another is smaller, than any of the above species. 



The males of our clear winged species can easily be distinguished, as A. Paniscus 

 has no trace of bands of pale scales across the abdomen, while A. circumdatiis has 

 five and A. ciiu/vlatus practically only three bands, and the last two species can be 

 distinguished froju each other by the extent of darkening on the foremargin of the 

 wings. 



The females of our three species are less easily distinguished, but the extensively 

 dark foremargin of the wings of A. circumdatiis should readily distinguish that 

 species. 



A. Paniscus ? . 



Abdomen xoith practically 

 only three bands of pale scales, 

 which are placed on the fore- 

 margin of the 2nd, 3rd, and 

 4th segments, those on the 

 hindmargin of the 5th and 

 6th segments being scarcely 

 defined. 



Postocular scales silvery. 



Legs with numerous pale 

 scales ; hhid tibiae toith a 

 dorsal frim/e of splayed-out 

 black scales. 



Wings with only the 

 costal and subcostal cells 

 darkened. 



A, cingidatiis 9 • 



Abdomen with five well- 

 defined bands of pale scales. 



Postocular scales whitish. 



Legs with scarcely any 

 pale scales on the tibiae ; 

 hind tibiae with no splayed- 

 out black scales. 



Wings with only the 

 costal and subcostal cells 

 darkened. 



A. circumdatiis ? . 



Abdomen with 

 of pale scales. 



five bands 



Postocidar scales yellowish. 

 Legs with numerous pale 

 scales; hind tibiae with no 

 splayed-out black scales. 



Wings with the foremargin 

 conspicuously darkened for 

 considerably more than the 

 costal and subcostal cells. 



The female of A. Paniscus may be known from the males of A. circiimdatus and 

 A. cingulatus by the difierent abdominal banding, wider frons, and more densely 

 scaled hind tibise. 



1. A. fenestra tus Fallen. Wings with conspicuous dark brown 

 markings. Scutellum reddish brown. Legs black, with reddish tibiae. 



A very handsome particolored fly. 

 markings suggest an idea of Chrysops. 



The dark wing- 



ed . Ground colour black, moderately shining ; clothed all over with conspicuous 

 particolored pubescence. 



Face rather produced roof -like over the elongate mouth-opening, broadly 

 blackish all down the middle and on the sidemargins but with the intermediate 

 spaces rather obscurely orange-red, and with the lower part of the sides and 

 all round the mouth-edge except on just the front part obscurely orange or 

 yellow ; on all the middle part of the face shimmering elongate yellowish 

 white (ranging to brownish orange) scales occur, and these scales extend 

 upwards for some distance above the antennae, and downwards (becoming 

 sometimes silvery) on the lower orange sides of the face ; some pale yellow 

 or orange (rarely black) pubescence begins on the eyemargins a little below 

 the antennae and is erect and not scaly, and yellow hairs usually occur over 

 all the sides of the face (especially on the lower part) among which are on the 

 upper part a few black hairs of similar texture, but occasionally all these 

 scattered hairs are black ; pubescence round the front part of the mouth- 

 margin all yellow except just at the middle; the space from the 



