Strationiyiidae. 57 



Fuglsangsø, Furesø, Hillerød, Frersiev Hegn ; Lolland at Maribo, and 

 Funen at Odense. It occurs in the same period as hydroleon, my 

 dates are '/?— '^/s. The larva was taken in Furesø on "'s it trans- 

 formed to pupa on '*/<; and the imago escaped on ^"/i;. 



Geographical distribution: — Northern and middle Europe from 

 the middle of Sweden to the north of France. 



Remarks. — The species oi Odontomyia, as seen, are diflferent witli 

 regard to the period in which they occur; argentata seems to be the 

 earliest with occurrence already first in May, then foUow tigrina and 

 ornata and I think aiso microleon occuring from the last part of May 

 to about the end of June, and finally the species hydroleon and 

 angulata occur later, chiefly in July and August. 



<i. Hoplodonta Rond. 



(Oplodontha.) 



The only species of this genus quite resembles the species of Odon- 

 tomyia; it is a rather small species with a greenish, black marked, 

 abdomen. The head is somewhat broader than the thorax, the face 

 protruding knob-like below the antennæ; the yovvls not descending 

 below the eyes. Antennæ as in Odontomyiu. Eyes bare, touching in 

 the male, separated in the female: in the male the upper facets larger 

 than the lower. The oral cone is rather long ; clypeus linear, stretching 

 from the epistoma to the labrum ; the proboscis is long, the basal 

 part of the labium moderately long, longer than in Odontomyia: the 

 labella are longer than the basal part of the labium, rather narrow, com- 

 pressed, somewhat blade-shaped, chitinised on the outer side; they 

 protrude forwards and form an angle with the basal part; when the 

 proboscis is retracted, the Jabella lie just in the oral aperture. Thorax 

 and abdomen as in Odontomyia. Wings with the radial vein absent, 

 cubital vein short, not forked, discai cell small, the tirst of the veins 

 rising from it, rudimentary, the third wanting; l)etween the discai cell 

 and the postical vein is a postical cross-vein. 



The larvæ quite resemble those of Odontomyia and have a pair 

 of curved spines on the ventral hind margin of the seventh abdominal 

 segment. They live in water. 



The species occurs in the same localities as the species of 

 Odotitotnyia. 



This genus only comprises one species: 



1. H. viridula Fabr. 



1775. Stratiomys, Fabr. Syst. Ent. 760. — 1842. Stratiomijs, Zett. Dipt. 

 Scand. I, 140, 11. — 1846. Odontomyiu, Loew, Linn. Entom. I, 491, 13. — 

 1862. Odontomyia, Schin. F. A. 1, 19. — 1903. Kai. palaarkt. Dipt. Il, 28. 



