SYRPHIDAE OF MAINE. 259 



Areoles: As applied to the sculpturing of the chorion or egg-shell, 

 a minute differentiated spot on the surface of a body (q. v.). 



Arm: As applied to the sculpturing of the chorion or egg-shell, a 

 slender, root-like, elevated process from a body (q. v.), extending into 

 the depression between the bodies. 



Aschiza: (Brauer) a section of the dipterous sub-order Cyclorrhapha 

 in which the frontal lunule and suture above the root of the antennae 

 are wanting. It includes the families Syrphidae, Pipunculidae, Platy- 

 pezidae and Phoridae. 



Body: As applied to the sculpturing of the chorion or egg-shell, a 

 microscopic elevated area surrounded by a depression. 



Carina: An elevated ridge; sec dorso-lateral carina, ventro-lateral 

 carina ; and also under slit-like spiracle. 



Circular plate: "Button" of authors: a usually smooth, or rough- 

 ened, circular or oval area of the stigmal plate situated, typically, 

 dorso-mediad on the latter; and usually distinct in color or texture 

 from the rest of the stigmal surface; sometimes partially or completely 

 surrounded by a ridge (Figs, 30-55; 34-3A and 36-6B). 



Cyclorrhapha: (Brauer) a sub-order of the Diptera in which the 

 larvae lack a differentiated head ; the pupae are always enclosed in the 

 hardened larval skin or puparium, from which the fly escapes through 

 a circular orifice or operculum at the anterior end. 



Dorsal line: The upper margin of the puparium, when viewed from 

 the side, extending from the position of the larval mouth-parts in front, 

 dorsally around to the base of the posterior respiratory process behind. 



Dorsal spiracular spine, ridge or nodule: A chitinous elevation of 

 the stigmal plate mesad from the circular plate (q. v.) (Fig. .32-500). 



Dorso-lateral carina: An irregular, longitudinal, zig-zag ridge along 

 the side of the body of the larva (formed by the fusion of the ends of 

 transverse folds of the integument) above the ventro-lateral carina, 

 and bearing the dorso-lateral segmental bristles of successive segments. 



False-head-: A globose grouping of the anterior segments of cer- 

 tain larvae, partially constricted from the succeeding segment. 



Integumental vestiture: Minute, close-set, short, microscopic hairs 

 or bristles covering the integument of the larva at least on the dorsal 

 surface; contrasted with the segmental vestiture (q. v.). 



Interspiracular ornamentation, hairs, spines, spurs, nodules, ridges, 

 or lamellae: Armature of various kinds occurring in the interspira- 

 cular spaces (q. v.). See also, dorsal spiracular spine. 



Interspiracular spaces: The areas between and around the slit-like 

 spiracles on the apex of the posterior respiratory process. These are 

 four in number on each stigmal plate ; one between the dorsal slit-like 

 spiracle and the circular plate; one between dorsal and median spiracles; 

 one between median and ventral spiracles ; and one mesad from the 

 ventral spiracle. 



Jaws: Of aphidophagous larvae, a pair of chitinized, A-shaped lips 

 above and below the mouth-opening (Fig. 30-4C). 



