ee 
/ 
THE MYCETOPH/ILIDA. 149 
broad ; first longitudinal rudimentary ; second longitudinal not very 
long ; upper fork of third passes much beyond the second, hind fork 
FIG. 33.—Wing of Ditomyia fasciata. 
ending at the tip of the wing ; fourth arising from the third nearer the 
apex than the connection with the third and second; the sixth (anal 
vein) extends to the border. The larve live in Bo/ett. This genus 
seems to be doubtfully represented in Britain. There are only two 
species, one of which is found in England. 
D. fasciata, Mg. = trifasciata, Wiz. 
Yellow. Thorax with three brown stripes, the lateral pair shortened 
in front; a brown spot on the sides. Abdomen blackish-brown, 
sutures and genitalia light brownish-yellow. Palpi brownish, the last . 
joint shorter than the other three. Antennz brown, yellow at the 
base. Legs brownish, the femora yellow ; tarsi brown. Wings grayish, 
with three brownish bands (transverse), one at the apex, one in the 
centre, the third towards the base. Length 2 to 3 lin. 
Mycetobia, Mg. 
GENUS /lestastina, Wtz. = | dee Wik. 
| Ditomyia, \W\k. 
Head, thorax, and abdomen and legs as in Ditomyia; palpi 
4-jointed, the first joint small. Antenne 17-jointed, basal joint 
smaller than the others ; the last joint small. Eyes reniform ; ocelli 
three, the middle one small. Wings as in Ditomyza. The larve live 
in Boleti and rotten wood. 
Ceroplatus flavus, Zett. 
P. annulata = { : 
P. vittata, W\k.* 
Testaceous. Palpi tawny ; antennz brown, testaceous at the base. 
Thorax with three brown stripes, the middle one longest, broadest in 
front. Abdomen with a brown dorsal stripe. Legs yellowish, tarsi 
brown. Wings grayish-brown. This is a rare insect. 
* I believe vittata, Wik., to be synonymous with annulata, Mg., and therefore 
the same as Zetterstedt’s Ceroplatus flavus. 
