1919.] i-W 



i^'i-oup :i])avt from tlie others. ;is they exhibit a sexii;!.! iliuiorphisra o£ the 

 wings. In the female the apical portion of the wing is much abbre- 

 viated, though the organs appear to be quite suitable for flight. In the 

 other species tlie wings art^ sexually hoinonutrphic. 



1 . Dri/opa anr/citlaf/tn (Fourcv. V ncr Oliv.). — This species is readilv 

 distinguished from D. li/ridiis by its moi-e elongate form and the whitish 

 sheen of its surface ; it has a narrower, more convex head, and longer 

 antennae with a paler shield. The aedeagus differs from that of all the 

 other species, inasmuch as it is somewhat dilated at the junction of 

 the basal and forcipital ]wrtions. I know of only two localities foi- it in 

 this country, viz. Ramnor near Broekenhurst (wdiere it occurs in fair 

 iHUubcrs, mixed with D. lurithis and D. atriatellmi. in a small pond 

 about eight yards in eircinnference), and Horning, in Norfolk, where it 

 occurred in company with Z>. unglicanus. The locality " Sway," men- 

 tioned by Signor Dodero, is a mistake, the specimens 1 sent to him came 

 from liamnor, which is about three miles from the Sway pits. When 

 alive it may be picked out from the other species with ease and certainty 

 by its white appearance and its shape. 



According to Ganglbauer this is Parnus proHferlcornis Er., and 

 he appears to have changed the name to auriciilafus in defei'ence to the 

 statement of Des Gozis (Recherche, p. 9 ) tliat this is the (no'iciihifufi of 

 Olivier. If Olivier's description goes for anything, Des Gozis was wrong ; 

 if the description does not go for anything, 1 do not know why Des Gozis 

 should have changed the name. Ganglbauer gives Fourcroy as the first 

 describer ; the identifications of his species are notoriously dou])tfnl. 

 Hence this name, recently adopted, is no more certain tlian the one it 

 has replaced. 



2. D. f/rise/fn Er., Sturm, and Gangll)auer. — This insect is much 

 broader than (n/r/culatii-^. and is certainly distinct from it. The aedeagus 

 is cylindrical and parallel- sided in its basal portion, the outline of the 

 forcipital portion is almost triangular, and the point is very shai-p. 



D. ijriiteus appears to be very rare in this country. 1 captui-ed it 

 nuiu}^ years ago at Hammersmith Marshes and at Morden, Surrey, both 

 of which places have ceased to l)e entomological localities. I have also 

 u beautiful male individual, for which I am indebted to Mr. Jas. Edwards, 

 from Horning ; and of recent years it has occm-red in fair nnnd)ers at 

 Sway and Holmsley, Hants. It is the D. uuriculatus of Mr. Edwards's 

 note in the Ent. Mo. Mag. 190S, p. 102. According to Dodero, the 

 species is widely distributed in Europe and western Asia, where it 

 extends as far as Samareand. 



