24 Ortliorrhapha brachycera. 



antenna. The segments are broader than long; the last segment is 

 somewiiat longer, cleft behind and thus ending with two points, each 

 of tliese points bears a soniewliat feathery bristle. and a similar bristle 

 is found on each side of the joint ; below the joint the anus is found 

 A as a longitudinal split. (Brauer says that the last segment 



Éis „abgerundet", that is erroneus.) The segments above have 

 some curious, short but strong bristles, being thickest towards 

 the ends. On the ven tral surface there is on each segment, 

 laterally, a slightly elevated tubercle with some similar bristles. 



\i' 



I 



^ and invvardly to this, on each side, a long bristle, and be- 

 ' 'f\ tween the latter, in the middle, each segment has a bed of 

 /uli\^\) depressed hairs. On the prothoracic segment there is a spi- 

 /ww/ racle on each side, and then on the metathoracic and on 

 the first seven abdominal segments, but these spiracles are 

 / \ very small. Above, near the apex, the last segment has the 

 Fig. 7. terminal spiracles lying in a transverse split, surrounded by 

 LarvaofxV. a not very conspicuous, asteriformly arranged bundle of hairs. 

 pantheri- Tijg larvæ live in water among piants and niay in winter 

 nus. xi. Qp early spring be found among the flood refuse at the 

 horders of fens and lakes or on other humid localities. The larvæ 

 hibernate. and the transformation to pupa and development of the 

 imago take place in the following spring and summer. 



The Nemotehis species are not very lively, they occur in the neigh- 

 bourhood of water, in fens and similar localities, where they often are 

 seen on the flowers of Umbelliferæ and Compositæ, sometimes in great 

 numbers, and they are easely caught with the fingers. Some of them 

 seem to prefer salt marshes. 



Of the genus 50 species are known from the palæarctic region, 

 most of which are southern forms; only 4 species have hitherto been 

 found in Denmark. 



Tabk of Species. 



Males. 



1. Abdomen white with black spots, cubital vein forked "I. 



— Abdomen black, cubital vein uot l'orked 4. nigrinus. 



2. Venter wliite with black spots 3. 



— Venter black witli white incisures and a white spot. . . 2. uliginosus. 



3. Snout rather long, abdomen white with a basal and an 



apical black spot, venter white with a basal black spot 1. pantherinus 



— Snout short, abdomen white, besides black basal and 

 apical spots with a spot on the third segment, venter 



white with black margilial spots 3. notatus. 



Females. 

 1 . Abdomen with white spots, cubital vein forked 2. 



— Abdomen entirely black, cubital vein not forked i. nigrinus. 



