76 
DIPTERA 
This fossil genus greatly resembles Leia ( Glaphyroptera Winnertz) but differs mainly in having the 
the costa prolonged beyond the tip of the radial sector, in the rather shorter basal cell R, and in the 
position of the fork of the cubitus distad of the proximal end of the R-M crossvein. 
Type species : P. eoceiiica, Meunier. 
Geographical distribution of species : 
I. P. eoccnica, Meunier, Mon. Mycetoph. etc. p. i58 (i), pi. 12, f. 19, 20 Baltic amber. 
(1904). 
« 
Leia cnrvipetiolata. Meunier [N eoglaphyroptera), may possibly also belong here. 
26. Genus LEIA, Meigen 
Leia. Meigen (part), Syst. Beschr. Vol. i. p. 258 (3i) (1818). 
Lejomya. Rondani, Prodomus. Vol. i, p. 195 (6) (i856). 
Lejosoma. Rondani, Prodomus. Vol. i, corrigenda (r856). 
Glaphyroptera. Winnertz. Verh. Zool.-bot. Ges. Wien. Vol. i3, p. 781 (22) (i853). 
Neoglaphyroptera. Osten Sacken, Catal. Dipt. N. Amer. p. 10 (216) (187S). 
Characters. — Head with elevated vertex, oval, flattened in front, placed low upon the thorax; 
eyes elongate oval, somewhat emarginate at the base of the anennse; ocelli three in number, placed in 
a curved line upon the broad front, the laterals large, rather close to the eye margin though not 
contiguous, the middle ocellus smaller; palpi large, incurved, four jointed, the first joint smallest, the 
fourth as long or longer than the preceding (PI. I, Fig. 24); antennae projecting forward, 2-|-i4 jointed, 
the two basal joints differentiated, setose at the apex, the flagellar joints cylindrical, somewhat compressed, 
short pilose. Thorax oval, highly arched; scutellum small, nearly semicircular in outline; metanotum 
high, steep; halteres small. Abdomen seven segmented, slender; in the male C3'lindrical, and with small 
forceps (PI. 7, Fig. 6); in some forms the seventh segment is reduced and nearly hidden by the 
sixth sclerite; in the female flattened and ending in a short ovipositor with two small lamellae. Legs 
moderately strong, all tibiae with spurs and lateral setae; fore tibiae with a range of delicate setae on the 
flexor and another on the extensor surface ; thei'e are also several scattered sets ; middle tibiae with one 
range of delicate setae and a single prominent one on the flexor surface, two ranges of rather stout setae 
on the extensor surface, a single seta between the latter near the apex, and three or four setae in an 
irregular row near the range on the flexor surface ; hind tibis with a range of delicate setae on the flexor 
surface and two ranges of stout setae on the extensor surface, besides several smaller scattering ones. 
Wings somewhat longer than the abdomen, elongate oval, with rounded base; subcosta ends in the 
costa at one-fourth or one-third the wing length from the base and is connected with Rj by Sca (subcostal 
crossvein) near its apex ; the costa ends at the tip of the radial sector and far from the tip of the wing ; the 
basal cell R is very long extending beyond the middle of the wing ; the media usually forks noticeably 
before the base of the radial sector; the cubitus forks proximad of the proximal end of the R-M cross- 
vein, its anterior branch is sometimes slightly disconnected at the base; the anal vein though rather stout 
is incomplete (PI. 5, Fig. 12). The larvae live in mushrooms. 
Type species : The name Leia replaces Neoglaphyroptera because Curtis designated L. fascipennis 
Meigen as the type and because Rondani, the first reviser of the genus, defines it as above. It appears 
that the name Leja was used by Dejean for a genus of Coleoptera. Scudder dates it 1821 and credits it 
to Megerle. Lacordaire states that it was used by Dejean in his first catalogue which according to Hagen 
