XVI GLOSS AE\. 



Mcdiasfi/ictl vciti. —ldf]\uciil with llie auxiliary vein, that is to say, tlie iirst 

 vein belove tlie costa ; also known as tlie subcostal vein, but some 

 authors (including Verrall) employ tlie term subcostal for the 1st 

 longitudinal vein. This appears illogical to the present author, since 

 the very n;nne subcostal suggests a position immediatelj' beneath tlie 

 costa. 



Mesoplcto-a. — The pleural area immediately in front of and slightly below the 

 roots of the wings. 



Metanot'um. — The hindermost portion of the thorax, situated directly below 

 the scutellum, highl.y developed in some families of Nematocera, 

 especially the Tipui.id.e. 



MetcqiUura. — Tho pleural area immediately behind and slightly below the 

 root of the wings. 



Metapneustic. — Used of larvre in which the spiracles are confined to tin- 

 posterior segments only. 



Metatarsus. — The 1st joint of the tarsus, that is to say the one adjoining the 

 tibia, the following joint of the tarsus being the second. 



MicrochatcB. — The smaller bristles in Diptei-a, distinct from pubescence or 

 hairs, but not of suflicient size or importance to rank as macrochaeta', 

 and therefore of much less taxonomic value. 



Micropkoiia. — Verrall's name for the Emimd^ and Doliciiopiu.e. 



3Ii/stax.— The " moustache" ; strictly applied to the long hairs on the cheeks ; 

 seldom, if ever, present in the Nematocera, most conspicuous in the 

 very pubescent grouiDS of Bracmyceua, such as A.sii.id.e, Bo.mhyi.iid.k, 

 etc. See Barha. 



Ncitraf/o)/. — The older authors' name for venation. 



Niie blue ov Kile green. — A somewhat pale shade intermediate between blue 



and gi-eeu. 

 Notaoantha. — Brauer's term, used by other authors also, for the Stratiomyid.e, 



" Xylophagid.e" (regarded erronously as a family) and Ccenomyid.e. A 



snperfamily, iu the view of such authors. 

 Nymph. — The name applied to the pupa when it is active and not fixed. 



OhfectcE. — Applied to those pupje that show no sign of the shape of the future 

 imago. 



Occiput. —The hinder surface of the head. 



Ocellar triangle and ucelli. — The simple eyes in Diptera (or other insects) are 

 placed on a triangular spot on the vertex of the head, which is generally 

 elevated (sometimes considerably so) above the surface, called the 

 ocellar triangle, the ocelli being placed at each corner of it, Avhen there 

 are three. Sometimes there are two only, sometimes they are absent, 

 but in no instance are there more than three. In some families they 

 are well separated (MYCETOPniLiD.i:), when they are placed directly on 

 the frons, in the form of a more or less flattened triangle, or iu an 

 absolutely straight line. As a rule they are xery constant characters 

 when present. 



Ochraceous. — Of the colour of brown ochre with an admixture of yellow. 



Orbit. — The margins of tlu- large compound eyes, whether such are distin- 



