Asilidae. 21 



Female. Abdomen a little broader than in the male, for the 

 rest quite agreeing with it. 



Length 13 — 17 rnm. 



I possess a female specimen of this species with nearly quite 

 pellucid wings, these being only slightly brownish at the anterior 

 margin, 



D. oelandica is rather common in Denmark though it does not 

 belong to our most common species; Charlottenlund, Frederiksdal, 

 Brede, Hillerød, Faxe, Thureby south of Koge ; in Jutland in Norholm 

 Skov near Varde, at Silkeborg and at Stovring near Randers. My 

 dates are '^'^h—"h. 



Geographical distribution: — Most parts of Europe down into 

 France; towards the north to middle Scandinavia. 



3, D. atricapilla Meig. 



1904. Meig. Klass. eur. Zweifl. Ins. I. 256, 4. — 1847. Low, Linn. 

 Entom. Il, 413, 3. - 1862. Schin. F. A. I, 120. — 1903. Kat. palåarkt. 

 Dipt. II, 103. — 1842. D. fuscipennis Zett. Dipt. Scand. I, 184, 4. 



Male. Eyes in the living specimens of a beautiful blue somewhat 

 metallic colour. Face dark brown pruinose, somewhat silky, below 

 the antennæ shining black; epistomal beard not dense, black. Pro- 

 boscis and palpi black, the first with ferrugineous hairs at the apex, 

 the latter with black hairs. Antennal tubercle moderately prominent. 

 Frons and vertex shining black; occiput black with black hairs, 

 silvergrey pruinose along the posterior eye-margin when seen in 

 certain directions. Antennæ black, the first two joints with black 

 hairs; first joint about one and a half times as long as the 

 second, the third as long as the two first together, Thorax black, 

 the disc densely punctate and hence only slightly shining; in the 

 middle on the front half two somewhat elevated, glabrous stripes and 

 on each side of them a very faint, narrow, brownish hoary stripe; 

 the disc otherwise with short, black pubescence. Præsutural and 

 supraalar bristles black. Scutellum rugose. Pleura black shining; the 

 hairy stripes fully developed, brown; some longer hairs at the hind 

 margin of the mesopleura; the long hairs on the metapleura black. 

 Abdomen black, the hind margins of the segments narrowly pale; 

 venter coloured in the same way; abdomen sparingly clothed with 

 short, black pubescence, on the lateral margin of the first segment 

 long, black hairs. Genitalia with rather short, partly pale hairs. Legs 

 somewhat strong, entirely black ; the hind tibiæ only slightly thickened 

 at the apex, the hind metatarsi almost not thickened ; coxæ slightly 

 brownish pruinose on the outer side and clothed with long, brownish 



