A>'D DE\^ELOPMENT OF CO.VIYS IXFELIX. 245 



and club-likp, composed of eleven segments, the funicle being six-jointed, while the 

 pedicel is shorter than the succeeding segments. From the third segment, the joints 

 which go to make up the flagellum decrease in length, but increase in width and become, 

 in the female, compressed towards the tip ; in the male they remain almost cylindrical. 

 Except for the pedicel the whole organ is clothed with fine black hair. The antenna is 

 light brown at its base, shading to black in the flagellum. 



(c) Head (PL 12. figs. 26, 27). — The surface of the head and face is curiously 

 sculptured and punctured ; it is golden-brown, almost black beneath the eyes, which are 

 very dark and composed of fine facets devoid of setae. Between, and slightly behind, the 

 eyes are three ocelli, the two basal being nearer the true eyes than they are to 

 one another. 



(d) Mouth-parts. — The maxillary palpi are the most conspicuous parts, being black and 

 projecting laterally. The maxilla (PI. 12. fig. 24) consists of a stout tooth made up of 

 three joints, the second bearing the palp on its outer surface and a small club-like 

 organ on its inner surface ; there is next a broad flattened part of two halves ; the palp 

 comprises four pieces, and ends in a curious club-like structure with long setae on its 

 inner face and tip. The loicer lip can be seen as a median structure below the 

 mandibles (PI. 12. figs. 22, 23) ; laterally it has a foliaceous setose apparatus united 

 basally by a triangular membrane, to which is attached a labial palp on either side ; this 

 is made up of three segments. The mandibles are very sim[)le, curved, plate-like organs, 

 with setae ; they are approximately triangular in outline, the apices curving inwards, the 

 bases being just above the maxillary palpi (figs. 22, 25). Overhanging the whole mouth- 

 apparatus is an upper lip, with a setose edge (fig. 22, u.L). 



(e) Thorax. — Except for the shining black collar (PI. 12. fig. 29, c.) the thorax is 

 yellow with conspicuous darker patches of pigment and black haii-s. The pronotum 

 (PL 12. fig. 29, pr.) is almost circular ; laterally it carries the small dark tegulae. 

 Behind the pronotum is the raised scutellum (fig. 29, sc), a triangular area with the apex 

 pointing backwards, and terminating in a tuft of long stitf black hairs, arising apparently 

 in two longitudinal rows. The mesonotum and metanotura are black and glossy, the 

 former serving as attachment for the fore \\ ings, and the latter for the hind wings and 

 third legs (Pi. 12. fig. 28). The thoracic spiracles are arranged in three pairs (PL 12. 

 tig. 29, s^.'~''j ; the mesothoracic are in a suture, only seen by looking from the side ; the 

 nietathoracic are conspicuous (figs. 28, 29). 



(f) Fore wing (PL 12. figs. 19, 20). — The wings are mottled with black fuscous areas, 

 and are covered with tine hairs, forming a fringe round the distal margin. At the base 

 of tiie short incurving vein is a group of dark seta?, with a second group just behind. 

 Erom the description of the genus as given in Comstock's report, quoted above, and 

 from my tigures, it will be easy to see the disposition of the wing-veins. 



(g) Hind iving (PL 12. figs. 19, 28). — These «ings are smaller and more delicate than 

 the fore wings, and are not mottled, being uniformly transparent and clothed with fine 

 short hairs. 



(h) First legs (PL 12. fig. 31). — The coxce are silvery white, while the, femora are 

 dark, separated from the coxae by two trochanters ; the tibia are slender and fuscous, 



