160 Oillioirlia|ilKi lnacliycera. 



Brauer: Denksclir. d. kai.s. Akad. d. Wissensch. Wien. iiiatli. nat. Classe, 

 XLVII, 1883, GI). 



The species of Acrocera are generally rare, tiiey sonielinies swarm 

 in the air. 



()f the genus 10 palæarctic species are known; onc is found in 

 Denmark. 



1. A. globulus l'anz. 



1803. Si/rplius, Panz. Fn. Gerni. LXXXVl, 20. — 1840. Erichs. Ento- 

 mogr. I, IGo'. 1.— \U'2. Zetl. Dipt. Scand. 1. ;229, 1.— 1903. Kat. palaarkt. 

 Dipt. II, 93. — 1862. A. gloJnilus p.p. Schin. F. A. I, 73. 



Male. Antennæ yellow or brown ; hinder eye-margin yellow 

 haired. Thorax brownish or biack, with sliort. reddish yellow pubes- 

 cence; humeral and postaiar calli pale yellow. Sculeiium yellow. 

 with a blackish, transverse stripe on each side at the base, and the 

 sides of the same colour, sonietimes it is blackish to a greater degree. 

 Abdomen yellow, a broad, black, transverse band at the base, dilated 

 at the sides and triangularly in the middle, thus the yellow hind 

 margin of the segment is curved double; the following segments have 

 black, transverse side spots at the front margins, and sonietimes 

 small, triangular middle spots, the spots on the first of these segments 

 may sonietimes form a band similar to the basal band. Venter black, 

 with yellow hind margins of the segments, these being broadest on 

 the first segments. Abdomen clothed with short, pale yellow hairs. 

 Legs pale yellow, with the apex of the last tarsal joint and the claws 

 black; they are clothed with short, jiale yellow hairs. Wings hyaline, 

 with yellowish veins. Halteres yellow. 



Feniale. Abdomen black or brownish to a greater degree than 

 in the male, the first observable segment quite dark. sonietimes with 

 a pair of small, yellow spots at the hind margin, the next segment 

 generally with a double excised, dark band at the front margin and 

 the following with triangular middle and side spots. Venter black 

 with yellow hind margins of the segments, but often almost quite 

 yellow. Legs yellowish, not so pale as in the male. 



Length 3,-5—5 mm. 



A. globulus cannol be termed rare, yet it is, as the species of 

 this family generally, only found now and then, but in most parts of 

 our country: Bogenæs, at Sorø, Tjustrup So and Karise; Lolland in 

 Koden Skov; Jutland at Kye near llinimelbjærget, Silkeborg, Funder. 

 Frijsenborg, Hald near Viborg and in Vang Skov near Hobro. My 

 dates are ';- — '^"/t. It has generally been taken on Salix, and it may 



