ENEMIES OF APHIDES. 405 



Division I. — Sialifia (Alder flies). 



,, II. — Hemerobiince (Lace-wings). 

 „ III, — PanorpidcB (Scorpion flies). 



HemerobiincE, he divides into three families : — 



Family I., Hcfnerobiidce. — Antennae moniliform ; wings mostly 

 with numerous transverse veinlets ; margins ciliated. 



Family II., Coniopierygidce. — Antennae moniliform ; wings, 

 scarcely any ; transverse veinlets ; margins not visibly ciliated, 

 minute ; covered with whitish powder. 



Family III., Chrysopidce. — Antennae setiform ; wings with 

 moderate number of transverse veinlets ; margins ciliated ; colour, 

 usually greenish. 



The family Hemerobiidce, Mr. McLachlan divides into seven 

 species, of which two, or perhaps three, are aphidivorous, as 

 follows : — 



^i. — Osmylus (i species), not aphidivorous. 



2.—Sisyra „ „ „ 



3. — Psedra (4 or 5 species) ,, 



4. — D^'epanopteryx (i species), aphidivorous. 



5. — Hemerobius (13 species) „ 



6 . — Megaloniiis. 



7. — Micromiis. Larva very probably aphidivorous. 



The Aphidivorous Genera are divided by him as follows : — 

 Drepanopferyx. — i species, D. PhalcEuoides (Linn.). 

 He77ierobiiis. — H. elegans (Stephens). 



,, H. pelliicidiis (Walker). 



,, H. i?ico7isp€chis (McL.), Fig. 6. 



„ ff. niiudulus (Fabr.), Fig. 7. 



,, H. micans (Olivier), Fig. 8. 



,, H. humnli (Linn.), Fig. 9. 



,, H. ?narginati4s (Stephens), Fig. 10. 



,, H. limbatus (Wesmael), Fig. ii. 



,, H. pint (Stephens). 



,, B. Atrifrofis (McL.). 



,, H. snb?iebulosis (Stephens), Fig. 12. 



„ H. nervosus (Fabr.), Fig. 13. 



„ H. Concinnus (Stephens), Figs. 14, 15. 



