These singular little insects are not unfrequently found on 

 windows, where Mr. Dale has captured many curious species. 

 Mr, Haliday has formed them into a genus, and Mr. F. Walker 

 has favoured me with the following outline of his views on the 

 arrangement of the British species. 



I. Abdomen petiolated. A. Wings ciliated. 



* Base of the superior wings represented by the costal 

 nervure alone: inferior rudimentary, confined to 

 the costal nervure. 



12. M. pulchellus Walk.— Curt. Brit. Ent. pi. 411.— July and 



August; dry sunny banks and grass in fields in 

 September, Southgate. 

 ** Wings perfect. 



f Ovipositor exserted, longer than the abdomen. 

 12*. M. atripennis Walk. — June, amongst grass in a wood. 

 ff Ovipositor concealed beneath the abdomen. 

 The species of this division are found amongst grass in fields 

 from May to September. They walk slowly. 



5. M. longipes W. — June and July. 



4. M. Ovulorum? Linn.F.S. 1644. 10. M. fimbriatus W. 



7. M. flavipes ?f.— June. 9. M. niger W. 



B. Wings not ciliated. 



8. M. dimidiatus Hal. 15th Sept. — There are 12 others 



named by Mr. Walker : they jump slightly, move 

 faster than the species of the preceding division, and 

 inhabit the same localities. 



II. Abdomen sessile. A. Wings not ciliated. 

 These are found with the species of the preceding division, 



at the same periods and in the same situations. They run 

 very fast ; but do not jump, it is supposed. 



2. M. acuminatus Curt. 1. M. fuscicornis W. 



16. M. Atomus? Li7in. S. N. 2. 941. 76. 



6. M. pusillus W. — June, windows. 



B. Wings ciliated. 



The species of this division are very minute, and may be 

 found from June to October on windows. 



13. M. cucullatus Ctirt. 



3. M. Punctum S/iaxv. — Limi. Trans, v. 4. 189. pi. \S.f. 1. 



14. M. pallidus Curt. 15. M. longicornis Curt. 

 11. M. minimus Walk. 



C. Wings none. 



19. M. apterus Walk. — New Lanark, Scotland. 



17. M. Monas, and 18. M. Termo, I do not know, and Mr. 



Walker has 30 more species named. 

 The Plant is Viola palustris (Marsh Violet). 



