DURHAM DIPTEBA. 1 29 



XXIV. 



Family XXIV.— DOLICHOPODID^E. 



. The life history of only a few species is known. The larvae 

 have been found in damp earth, under bark and leaves, &c. 

 Mr. Verrall has published a series of tables of the British 

 genera in the Entomologist's Monthly Magazine, July, 1904, 

 to October, 1905. I have added many particulars from them, 

 especially in the females of Dolichopus, &c, but have also 

 kept partly to the tables I had already prepared, taken from 

 Schiner. Mr. Verrall follows a somewhat different order. 

 Students should consult his tables, where further particulars 

 will be found as to distribution, &c. The characters apply 

 mostly to the males. It is often impossible to identify the 

 female by herself. 



TABLE OF GENERA. 



1 (61). Arista dorsal, or at least not exactly terminal, that is, 



not exactly in the middle of the end of the third 

 joint (III. 33, 34). 



2 (8). V.4. forked, V.4.a. bent upwards towards V.3., which 



it almost meets. Psilopus, Mg. (219) 



3 (2). V.4. neither forked nor bent upwards towards V.3., 



but straight, or at most bayonet-shaped (V. 14), 

 or slightly bent towards V.3., but never like a 

 X-vein. 



4 (56). X.5. about the middle of the wing, or not much 



beyond it, and always shorter than the last section 

 of V.5., that is V.5 4 (V. 14). 



5 (15). Yellow or grey species, not metallic green, or if partly 



metallic green, then the wings, and especially the 

 veins, bright yellow. 



6 (11) (12). Acrostichal bristles present in two rows. 



7 (10). V.6. distinct to the margin, male organs usually 



prominent. 



8 (9). Male organs prominent, and bent hood-like under 



the abdomen. Neurigona, Rnd. (220) 



9 (8). Male organs small and hidden; hind metatarsus with 



a tuft of bristles and notched beneath in the male. 

 221. Eutarsus, Lw. (1188. aulicus, Mg.) 



