158 Psyche [Sept. -Dec. 
lower margin of the front, twice as far from the eye as from the 
postantennals and dividing the margin into three equal parts. 
Lowest lateral bristle far above the antial and much farther 
from the eye than usual. Upper transverse row of four bristles 
equidistant, forming a line that curves downward medially. 
Antennae greatly enlarged, oval or slightly pyriform, as long as 
half the eye-height, considerably longer than wide; arista stout, 
as long as the head-height. Palpi small, flattened, with five 
moderately long bristles along the apical half of their outer edge. 
Two large downwardly directed bristles on the cheek, but none 
above these in front. Postocular cilia of moderate size. Meso- 
notum rather shining, with one pair of dorsocentral bristles. 
Scutellum broad, fully twice as wide as long, the posterior 
margin gently arcuate; four equal scutellar bristles. Propleura 
with several weak bristly hairs, next to the front coxa, and a 
few similar ones at the upper angle. Mesopleura entirely bare 
and shining above. Abdomen entirely devoid of any noticeable 
bristly hairs above, except for a few exceedingly minute ones 
at the sides of the second tergite, and a weak fringe at tips of 
the sixth and seventh tergites. Second to fifth tergites of about 
equal length; sixth noticeably longer. Hypopygium small, re- 
tracted, its median projection with unusually weak bristly hairs. 
Legs slender, including the front tarsi. Middle tibiae with a very 
feeble dorsal line and a corresponding weak series of postero- 
dorsal setulae; hind tibiae with dorsal hair-line and a postero- 
dorsal series of 10-12 weak setulae the longest of which are 
much shorter than the width of the tibia; hind femora slender, 
with no noticeable bristly hairs below. Costa reaching beyond 
the middle of the wing ( 100 : 5 7 ) , its bristles closely placed, very 
short, not much longer than the width of the costal vein; first 
section of costa one-half longer than the second; third very 
short (48:32 : 5) ; cell formed by the second vein very small and 
narrowly ovate. Third vein widely separated from the costa at 
its middle as it is curved posteriorly and the first section of the 
costa is noticeably curved forward. Fourth vein evenly arcuate, 
not recurved at either base or apex; fifth vein sinate; sixth very 
slightly so; seventh strong. Base of the third vein without 
bristles. 
Type from the San Juan Mts., near Cienfuegos, Cuba, Jan. 
1927 (C. T. and B. B. Brues). 
M. cavita is conspicuous by the much enlarged antennae of the 
