1947] 
Cerceridce 
7 
Venter with yellow spots ; yellow of bands leave a 
somewhat diamond-shaped black mark open only 
to middle part of front margin completa 
15. Hair-lobes less than the breadth of one apart; yellow 
of clypeus comes to a point in middle of front edge ; 
femora rufous, body black with yellowish marks ; 
abdomen strongly convex transversely thione 
Hair-lobes plainly separated by more than breadth 
of one of them 16 
16. Tip of antennae black ; third joint slender, longer than 
fourth, marginal cell and stigma very slender ; sec- 
ond submarginal cell with curved sides ; legs mostly 
yellowish to rufous ; second submarginal cell very 
large, face much narrowed in middle 17 
Tips of antennae rufous; face less narrowed; second 
submarginal cell normal size, pedicel full one-half 
of cell 18 
17. Third antennal joint a little longer than the first 
(scape) ; face narrowed above, near end of lateral 
face marks becoming wider again, upper side of 
lateral lobes curved, supraclypeal mark not above 
antennae ; hair on vertex, thorax and abdomen grey 
to reddish brown, on face yellowish white ; second 
submarginal cell very large, sides much curved, 
pedicel about one-third of cell height orpline 
Third antennal joint not as long as the long scape; 
face still more narrowed above than in orpline; 
upper side of lateral lobes straight; hair on body 
mostly white to light grey, ventral fringes white, 
face with snow-white hair ; second submarginal cell 
still larger, sides more curved, and pedicel less 
than one-third of cell height front at a 
18. Third antennal joint much longer than the fourth, 
and a little longer than the first (scape), fourth 
joint three times as long as broad; enclosure ob- 
liquely striate ; clypeus impressed above the 
slightly raised three-toothed margin ; pygidium 
with parallel sides ; abdomen black, with subequal 
bands above and lateral spots below sexta 
