NEMATOCERA. 8i 



D. flava^ Mg. = Cec. hilarella, Zett. 



The (5" yellow; with black head. Antennae dark brown, i6-jointed, 

 as long as the body ; joints never longer than their petioles, the latter 

 yellow, the joints are alternately longer and shorter. Wings opal- 

 escent ; veins faint and yellowish ; first longitudinal less than half 

 length of wing ; second longitudinal vein slightly curved ; second 

 branch of anal (3.4) curved obliquely to the hind border. Halteres 

 pale. Legs long and slender; pale yellow. Length i lin. 



The larv^ live in rosettes on the stalks of corn. (Die Larve soli 

 nach Roser 1. c. in Getreidehalmen leben.) 



D. jacobceie, Lw. 

 The larvje live in the flower-heads of Senecio Jacobcea. 



Sub-Genus. — Hornwmyia, Lw. 



H. Eagi, Hartig. 



This species, which is common all over Europe, is most abundant 

 m Switzerland and in England. The galls in the former place seem 

 to be of a pyramidal shape, in England they are horn-shaped ; both 

 upon the upper surface of beech-leaves (Eagus sylvatica). According 

 to some accounts the galls drop off and the larvae pupate in them. 



Imago. — Dorsum blackish-brown, with three narrow stripes ; abdo- 

 men flesh-coloured, with gray hairs. Antennae of ^ 24-jointed, 

 petiolate, of ? shorter and sessile. Wings brownish, with gray hairs, 

 but appear white against a dark background ; base of second longi. 

 tudinal vein hardly discernible; third longitudinal bent in front in a 

 rectangular manner, lower branch only visible at base, upper hardly 

 discernible, the fold almost looking like a vein, 2-2i lin. (Hartig — 

 Jahres-bericht, i, p. 4, 641 (1839). Piipa^ Fig. 5, Taf. i., vol. viii., 

 Lin. Ent. VVinnertz. Palpi, Figs. 22 and 23. Wing, Fig. 8, Taf. ii. 

 Antenna;, Fig. 9, a, b, c and d, Taf iii. 



H. caprecv, Wtz. = C. caprece. Hardy. 



The larvae of this species live in pustule-shaped galls on the leaves 

 of Salix caprea, aurita and oleifolia, and pupate under fallen leaves, 

 according to Winnertz. 



The imago is dark reddish-yellow, with three dark stripes on the 

 dorsum, of which often only the middle one exists in fragments. 

 Antennae shorter than body, 14-jointed, petiolate in ^, sessile in ?. 

 Wings large, whitish with grayish-white hairs ; second longitudinal 

 vein ending in the extremity of the wing, its base very weak ; third 

 longitudinal vein bending in front in the form of a bow ; f to i lin. 



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