NO. I 



BLACK FLIES OF GUATEMALA — DALMAT 



65 



Combs. — Groups of minute spines that are contiguous to one another, their 

 bases forming a single line, giving the appearance of the teeth of a comb. (Text 



fig. 8, 5-7.) 

 Granulosity (granulosa). — The state of being covered by granules or minute, 



usually circular, grainlike elevations. Among the pupae of Guatemalan species 



the granulosity is microscopic and may be present on the thorax and/or on the 



abdominal segments. (Text fig. 8, 1-2.) 

 Slipper-shaped. — That form of the cocoon that has a collar. (See "collar.") 

 Terminal spines. — Two spines or tubercles sometimes present on the dorsum of 



the ninth abdominal segment of the pupa, one on either side of the midline ; in some 



2*i 



CU2 



Fig. 7. — Diagrammatic representation of the wing of adult female, with im- 

 portant veins indicated. DC, discal cell; C, costa; Sc, subcosta; Ri and R2+3, 

 branches of the radius ; Cus, 2d branch of cubitus. 



genera or subgenera these are quite large, pointing dorsally and anteriorly so that 

 they can help maintain the pupa in its cocoon. (Text fig. 8, i, 2, 4, 5, 7, and 8.) 



Trichomes.^Erect hairs present on the thorax of the pupa ; may be simple or 

 branched. 



Wall-pocket. — That form of a cocoon that does not have a collar; it appears 

 somewhat conical, the anterior aperture being at the wide end, the base flat, very 

 much like a type of receptacle that might be hung on the wall to hold flowers. 



Larva (pis. 40-43, text fig. 9) 



Basal stalk of cephalic fan. — That part of the cephalic fan from which the 

 hairlike branches emerge. 



Occipital cleft. — An opening or concavity along the posterior ventral margin 

 of the larval head capsule; it may be absent or very large, with a diversity of 

 form and size according to the species. (Pis. 42-43.) 



Pectinate. — That condition of the branches of the cephalic fan in which it has 

 numerous minute hairs, somewhat equidistant, all extending in the same direction, 

 giving the appearance of a comb. 



