208 NEW YORK STATE MUSEUM 
codiplosids, breed largely in fungi. The type species 1s evidently 
widely distributed and persists through a considerable part of the 
growing season. 
Key to species 
a Basal clasp segment with the apical lobe broadly rounded, smooth........ 
(Mycodiplosis) acerina Felt, C. 243, 269, 270, 548, 688, 609 
aa Basal clasp segment with a long, setose lobe apically 
CMiyvCcOGdiplOsiS) Gtiecreima ele, C. ai 
COQUILLETTOMYIA Nl. g. 
This genus is allied to Mycodiplosis, since it has the anterior tar- 
sal segments unidentate. It may be separated therefrom by the 
conspicuous setose basal lobe at the internal angle of the basal 
clasp segment. The ventral plate is about as long as the style and 
broadly rounded apically, while the harpes are strongly chitinized. 
Lype Moycodiplosis lobata Pelt. 
Key to species 
a Abdomen dark salmon, the internal lobe of the basal clasp segment short, 
broad, naked, the ventral plate slightly emarginate; harpes incon- 
SPICUOUS eee eee CUEZeOdtpDlOSis) lObata Ie, C. 170 
aa Abdomen yellowish, the internal lobe of the basal clasp segment short, 
stout, setose, the ventral plate brcadly rounded; harpes short, spined 
apically retoxia deat ek eee se ica ee ne COCRMAMA WD GD, CG are 
aaa Abdomen light brown, the internal lobe of the basal clasp segment long, 
setose; ventral plate broadly rounded; harpes long, terminating in a 
INRA, CELAKAG ClviniNOUS JPCCESS. 66 oa0c000008 GCmtacta mm Sd, C. G22 
KARSHOMYIA Il. g. 
The form referable to this genus is a small, yellowish brown 
banded species allied to Lobodiplosis Felt and easily distinguished 
therefrom by the unique genitalia. The-stout basal clasp segment 
bears a broadly dilated, subfusiform terminal clasp segment; the 
harpes are strongly chitinized and very complex [pl. 41, fig. 1]. 
The wing is shown on plate 38, figure 7. Type and sole species, 
MISZCOGIPIGSrS Wilotiemi lel, Cecial, So 
YOUNGOMYIA n. g. 
This genus comprises several rather large, brownish Diplosids 
allied to Mycodiplosis and distinguished therefrom by the peculiar 
genitalia. The terminal clasp segment is greatly produced. being 
distinctly longer than the basal clasp segment, which latter has a 
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