NUMBERED LIST OF FAMILIES, 



Together with references to the Analytical Table and Notes. 



The sequence of the numbering indicates some proximity of relation- 

 ship, in most cases at least, in respect of some particulars. 



Nos. Refs. FAMILIES Notes 



I... . PULICID^E: fleas regarded as flies with atrophied or un- 

 developed wings. About 30 native species. 



II ... 3. CECIDOMYID^E : mostly gall-gnats, minute and midge-like, 



or very frail, slender and gnat-like. Cccidomyia destructor is 

 the notorious Hessian-fly, injurious to cereal crops. 



III ... 10. MYCETOPHILID^E : fungus-gnats; 34 genera; many com- 



mon species. The marvellous "army-worm," the larvae of 

 Sciara militaris, which (being not a feeder on fungi) may be 

 classified either separately or as belonging to this family, has 

 been observed travelling in Continental forests in millions, 

 described as massed together with a viscous mucus in bands 

 said to be as large as 5 or 6 inches wide, I inch deep, and 50 

 or more feet long ! 



IV. ... II. BIBTONID^E : 40 species of small and medium sizes; 

 commonly the males are black, but the females of some 

 species coloured; Bibio marci, of a largish size, pubescent, and 

 black, sometimes appears in great numbers on fine spring 

 days, as likewise do some smaller black species of the same 

 genus; ocelli absent ; semi-blind. 



V ... 13. SIMULID^E: midge-like flies, mostly with wings, limbs, and 



bodies of short length; the largest, Sinmlhun rcptntis, only 

 2-3 mm., is common; its larvae are aquatic. Some foreign 

 species are called sand-flies and are much dreaded poisonous 

 blood-suckers. 



VI ... 14. CHIRONOMID^ : midges and many small, slender and gnat- 



like flies ; Ccratopogon piilicaris, C. bipmictatus, and C. varius are 

 our commoner native blood-sucking midges, of which the 

 larvae have been found under the damp bark of decadent 

 trees ; the larvse of some others are aquatic, as also are all 

 those of the long slender non-blood-sucking species, including 

 those of the very common harlequin-fly, Chironoimis plnmosus, 

 as also of several congerers, including Cli. dorsalis, of which 

 the larvae are known as "pond blood-worms." 



