Hypoderma. 89 



abbreviated behind. Thorax is clothed with a dense pile which is 

 yellow anterior to the suture, black or brownish black behind it, 

 the colours sharply separated; the shining stripes bare. Scutellum 

 with yellow hairs; it is black and shining at apex and the apex is 

 truncate, a little incised in the middle, so that two, generally very 

 slightly marked protuberances are formed. Abdomen black or blackish, 

 densely pilose, the hairs on basal segment pale yellow, on third 

 or on third and a larger or smaller part of fourth black, and on the 

 rest yellow or reddish; venter yellow-haired. Legs with femora 

 black, tibiæ blackish brown or brown, hind tibiæ paler on apical 

 half, tarsi yellow; posterior femora thickened at base, especially 

 hind femora here with a dorsal hump ; hind tibiæ somewhat thickened 

 about middle; hind metatarsus long, thrice or nearly thrice as long 

 as second joint. Legs mainly black-haired; front tibiæ with short,, 

 dense yellow hairs below, hind femora with yellow hairs postero- 

 ventrally and hind tibiæ with the long hairs on posterior side yellow; 

 posterior coxæ and trochanters for a great part black-haired. Wings 

 brownish tinged, most on anterior half; veins brown. Squamulæ 

 whitish with more or less yellow margin. Halteres brownish. 



Female. Similar; frons a little broader, about double as broad 

 as the eye. Hind metatarsus longer, more than thrice as long as second 

 joint. 



Length 13 — 14 mm. 



H. bovis is common in Denmark and found in all piaces where 

 there is cattle, but, as well known, it is only rarely seen as imago, 

 and most of our specimens are bred; they were taken as larvæ on 

 ^^4 — ^^/e ^iid pupated on ^/g — ^^/g, the imagines came on ^^/g — ^V? 

 (Stub). The control in later years with the infested cattle has strongly 

 diminished its number. 



Geographical distribution: — All Europe, Asia, Africa and 

 North America. 



2. H. lineatum Vill. 



1789. Vill. Entom. Linn. III, 349, 7, Tab. IX, Fig. 1 {Oestrus). — 1824. 

 Meig. Syst. Beschr. IV, 173, 9 {Oestrus). — 1862. Schin. F. A. I, 397. — 1863. 

 Brauer, Mon. Oestr. 122, 4, Tab. II, Fig. 3, Tab. V, Fig. 8. — 1907. Kat. 

 palåarkt. Dipt. III, 588. 



This species is very similar to bovis. Male. Head as in bovis, 

 but relatively broader, and orbits and frons paler, more brownish 

 and the hairs all or almost all yellow. Thorax more roundish than 



