310 NEW YORK STATE MUSEUM 
The form described; M. perplexa, appears to be closely tem 
lated to M. diervillae Pelt, and it is possible that it 1s the 
female @f this: species. 
Key to species 
a Antennal segments 8 
b 4th palpal segment more than twice the léngth of the 3d; harpes 
broadlysnrounded apicallyec ss... ee jo his om fons spr, ©. sez 
bb 4th palpal segment nearly twice the length of the 3d; harpes subacute 
APICalliyears Moe Le oe Oe ane COCO EIN N iy So. Cy O22 
aa Antennal segments 9 
b Subcosta: uniting with the margin before the basal half; wings small, 
NATLOWstiis ye eee aan eosneeet (Micromytia) corni Felt, C. aso 
bb -Subcosta uniting with the margin at the basal half; wings rather 
large, broad 2a... 44-2 Mel cm omiysira): date vet leaves niche Osco 
aaa Antennal segments. 10 
DalLengthsr.5 mm; bodya darkebrowile se a) ani pieaiaDieeexean mss: 
LESTREMIA Macq. 
This genus is easily recognized by the characteristic fork of the 
fourth vein, by costa not attaining the apex of the wing and by 
the antennae being well developed, those of the male having 16 
and those of the female 11 segments. The segments of the female 
antennae are short, subcylindric or subconical and in some species 
at least, ornamented distally with thick rows of short, stout, chiti- 
nous, sensory processes. The male antennae are composed of 16 
segments, which latter are provided with a distinct stem nearly as 
long or longer than the basal enlargement, which in turn is orna- 
mented by one or more crenulate whorls from the base of which 
arise long, curved setae. ‘The genitalia are very characteristic. 
Nothing is known concerning the life history and habits of mem- 
bers of this genus, aside from the fact that they are most abundant ~ 
in the vicinity of forests. Kieffer states that the European L. 
leucophaea Meig. occurs in decaying beech wood and it is very 
probable that our American forms breed largely in rotting ligneous 
tissues. 
Key to species 
a Antennal segments 11; females 
b Abdomen reddish brown 
c Scutellum dark brown; basal segment of ovipositor with a length 
fully twice its width; terminal segment small, narrowly oval and 
distinctly shorter: tnane tiem basallanse Gimeratrars tas trina an een niens 
GUOMEALA im so, Co Ore 
cc Scutellum yellowish brown; basal segment of ovipositor broadly 
triangular, its length not more than % greater than its width; ter- 
minal segment nearly as long as the basal one, narrowly oval..... 
barberi n. sp. C. 934 
