40 Orthorrhapha brachycera. 



pupa is 5 mm long and 1,7 mm in diameter, dirty whitish; on the 

 front end there is a short projection witli two teeth, and to each side 

 of this is a long hair, pale at the base, blackish oiitwards, Thorax 

 anteriorly with two spiracular tubes, and on the disc with some hairs. 

 The second and eighth abdominal segments with a girdle of short, 

 fine, depressed brist les on the dorsal side, the interjacent segments 

 with similar, but longer bristles, placed on a brown band. The sheaths 

 of the legs reach to the end of abdomen in the female, but farther 

 behind in the male. The larva Avas found in humous earth under 

 leaves in a forest of beech-trees on '^U and ^^U and the imago came 

 on ^/o and ^"/n. 



The species of Neurigona may occur on meadows and on open, 

 humid and shaded piaces in woods on the foliage, but they are, I 

 think, most often seen on tree-trunks. The males are generally 

 more rare than the females; Kowarz communicates (Verh. zool. bot. 

 Geseli. Wien, XXIX, 1869, 566), that he saw a male of Erichsoni 

 flying repeatedly along a tree-trunk from below upwards, and he 

 thinks this behaviour is common for the males in this genus; this is, 

 I think, correct, as I have observed the males of suttiralis and quadri- 

 fasciata behaving just in the same way. 



Of the genus 10 species are known from the palæarctic region ; 

 5 occur in Denmark. 



Table of Species. 



1. Thorax grey in both sexes, or yellow in the female, 

 but then with a grey spot, and the bands on abdomen 

 incised 2. 



— Thorax yellow in both sexes, abdomen unbanded, or 



the bands not incised 4. 



2. Front tarsi in the male adorned; thorax in the female 



yellow with a greyish spot 1 . qnadrifasciata. 



— Tarsi in the male simple; thorax grey in both sexes ... 3. 



3. Wings infuscated towards the anterior margin; ab- 

 domen with narrow bands; discai vein scarcely bent, 

 posterior cross-vein considerably behind the middle of 



the wing 3. suturalis. 



— Wings not infuscated at the anterior margin; abdomen 

 unbanded; discai vein bent, posterior cross-vein near 



the middle of the wing 4. ahiominalis. 



4. Front tarsi in the male much longer than tibiæ; ab- 

 domen unbanded 2. paJlida. 



— Front tarsi in the male shorter than tibiæ, abdomen 



banded 5. Erichsoni. 



