Asilidae. 



11 



gaster „Libellenfliege" which name in Syst. Beschr. he changes to 

 „Schlankflige". 



Of the genus 22 species are known from the palæarctic region 

 2 of which have hitherto been found in Denmark. 



Tahle of Species. 



1. Abdomen with a dark, longitudinal line; hind femorawith 

 a longitudinal, black stripe on each side, the tarsi mainly 

 black, only pale at the hase; the peduncle of the second 

 cubital cell from the medial cross-vein longer than the 

 peduncle of the second posterior cell ; the fourth posterior 

 cell with a short peduncle 1. cylindrica. 



— Abdomen with dark transverse bands; hind femora with 

 a black ring near the apex, the tarsi pale to a greatextent; 

 cubital and posterior cells rather long; the peduncle of 

 the second cubital cell from the medial cross-vein not 

 longer than the peduncle of the second posterior cell; 



the fourth posterior cell has no peduncle 2. guttiveniris. 



1. L. cylindrica Deg. 



1776. Degeer, Ins. VI, 99, 10, Tab. XIV, Fig. 13, {Asilns). — 1842. 

 Zett. Dipt. Scand. I, 186, 1 et 1849. VIII, 2976, 1 et 1855. XII, 4581, 1. 



— 1847. Low, Linn. Entom. II, 403, 7. — 1862. Schin. F. A. I, 118.- 

 1903. Kat. palåarkt. Dipt. II, 101. 



Male. Epistoma yeliowish to bright yellow, grey on the lower- 

 most part; the epistomal beard white. Proboscis and palpi black. 

 Front and vertex yeliowish brown, the ocellar triangle dark. Occiput 

 yeliowish at the eye margin but greyish on the middle; the occipito- 

 orbital bristles yellow. Antennæ black, the second joint rufofulvous. 

 The eyes slightly dark greenish. Thorax greyish brown, the hinder 



Fig. 3. Anlenna of L. cylindrica. x 40. 



part and the scutellum greyish; on the disc three broad, brown stripes, 

 the lateral stripes abbreviated in front, all three pointed posteriorly 

 and not reaching the scutellum, the middle stripe generally divided 

 by an oiten indistinct median line. On the humerus a small, black 

 shining spot and from liere to the wing-root a narrow% black shining 

 line. The præsutural bristle yellow, the intraalar bristle black. The 

 pleura grey, especially downwards. Abdomen brownish grey with a 

 dark brown line along the dorsal surface; venter brownish grey. 

 Abdomen sparingly clothed with short, pale yeliowish pubescence; at 

 the apex of the first dorsal segment Ihere are some longer, yellow 

 bristles. The genital forceps black, shining, with somew^hat long, pale 



