54 Orthorrhaplia brachycera. 



The larva is reddisli brown or dark brown, generally witli some 



ongitiidinal markings, but these are often indistinct or wanting; 



it is very sparingly liaired; it has forwards ciirved spines oii the 



ventral side on i>oth tiie sixth and seventh abdominal segments (fig. 21): 



Fig. 20. Fig. 21. 



Fig. 20. Larva of O. ornata, abt. nat. size. 

 Fig. 21. The three last segments of larva of O. ornata, laleial view, 

 showing the forwards curved spines on tlie ventral liind margin of 



the tenth and eleventh segments. xVn. 



it has a lengtii of abt. '?>■> mm. — It is ciirious to see that whiie the 

 V)resent species and S. furcuta as iniagines are of equal size. the larva 

 of the latter has nearly twice the length of that of the formei-. 



This species is distinguished by its size and tiie colouring of the 

 abdomen; the faet that the female has the thorax dothed with erect 

 hairs as in the male is also characteristic. 



O. ornata is not at all rare in iocalities near water. where it 

 occurs in the herbage at the horders of lakes and ponds: Utterslev 

 Mose, Ordrup Mose, Fortundammen. Virum Mose, Furesø, Bagsværd. 

 Ørholm, Ruderhegn. Donse, Hillerød, Teglgaardsø: on Falster; Lol- 

 land at Lysemose near Maribo and at Ghristianssæde : Langeland al 

 Tranekær, and Funen at Langensø. It is an early species, my dates 

 are ^^/s — '"/b. The larva has been taken in April in Fortundammen 

 and Kildesøen, and the pupa in Fortundammen on ^' .>, on the latter 

 dato several cast pupa-skins were taken logether with the pupæ; the 

 pupæ developed in the following days. Botli larvæ and pupæ were 

 taken in tiie water, the latter floating on the surface. 



Geographical distribution: — All Europe down to Siciiy. lowards 

 north to middle Sweden but here referred to as rare. 



5. O. hydroleon L. 



1761. Musca, Linn. Fii. Suec. 1782. - 1842. Stratiomi/s. Zett. Dipt. 

 Scand. 1, 140, 10. — 1S46. Loew. Linn. Eiilom. 1.481.8. — ' 1862. Schin. 

 F. A. I, 19. — 1903. Kai. palaarkt. Dipt. II. 25. 



