Empididae. 95 



quite yellow pleura, the long antennæ with miich elongated first joint, 

 the presence of a supraalar bristle and the shape of the male genitalia. 



E. trigramma is common in Denmark; Frederiksberg Have, 

 Amager, Utterslev Mose, Charlottenlund, Ermelund, Geel Skov, Tyve- 

 krogen, Boserup near Roskilde; on Langeland at Lohals and in Jut- 

 land at Ringkjøbing and Silkeborg. It is a spring species; my dates 

 are ^^/s — Vt, It occurs in the outskirts of woods, in fens and also 

 on fieids and is found on bushes and low piants; sometimes it niay 

 occur in great numbers. I have taken it in copula on ^^/e. The pupa 

 was found in the ground in Geel Skov on '^'^U^ it developed on ^/5. 



Geographical distribution: — Northern and middle Europe down 

 into Austria and Styria; towards the north to southern Sweden. 



6. E. lutea Meig. 



1804. Meig. Klass. eur. zweifl. Ins. I, 228, 24. — 1822. Meig. Syst. 

 Beschr. III, 37, 40. — 1862. Schin. F. A. I, 107. — 1867. Loew, Berl. 

 ent. Zeitschr. XI, 17 et 21, 9. — 1903. Kat. palåarkt. Dipt. II, 239. 



Male. Eyes broadly separated, frons yellow; epistoma and jowls 



pale yellow. Vertex and occiput yellow, only the ocellar tubercle 



brown; occiput with a few black hairs. Labrum ferruginous; palpi 



pale yellow with fine hairs at the apex. Antennæ a little longer 



than the head, blackish or brownish; the first joint elongated, this 



and the second with short hairs; the third joint not quite twice as 



long as the two first together. Thorax yellow, slightly shining, The 



dorsocentral bristles somewhat short, not longer behind, irregularly 



uniserial or somewhat biserial, black. Further, a humeral bristle, a 



posthumeral, a notopleural, a supraalar and a postalar bristle, all 



black; besides there are some smaller but however conspicuous hairs 



both on the sides and in the præsutural depression. Scutellum yellow, 



with two black marginal bristles. Pleura yellow, metapleura with 



only two or three black bristles; the prothoracic spiracles yellow. 



Abdomen and venter yellow, somewhat shining, clothed with short, 



yellow hairs, at the hind margin of the three first segments longer 



and somewhat darker hairs. Exterior genitalia 



large, the lower lamellæ directed somewhat up- 



wards or straightly outwards, their lower hinder 



angle drawn out into a long styliform process, 



beset with yellow hairs below, and with black 



hairs above; the upper lamellæ protruding be- 



tween the upper margins of the lower, they 



have a black upper margin, densely beset with "' ' ' . ' 



^^ ® ' •' male genitalia. 



short, blackish hairs. Penis thick at the base, 



