margin or fold to the scape, the flagellum much more massive, 
with reduction in size of the pedicel and enlargement of the 
club, the scutellum with an apical fascicle of hairs, etc. From 
Chrysoplatycerus it differs further in having the flagellum mas- 
sively clavate, with a solid club, instead of being laminately 
expanded, the mandibles obscurely tridentate, the apical fascicle 
of hairs on the scutellum much smaller, consisting of one trans- 
verse row of setae, etc. 
The males of Clirysoplatycerus, Zarhopalus, and Coelaspidia 
are very much alike, and in the absence of females might easily 
be considered to belong together in one genus. The habitus of 
all is exactly alike, and, as the best distinguishing characters are 
rather recondite, I offer the following table as an aid to their 
recognition : 
1. Mandibles narrow at apex, with an acute median tooth and an angu- 
lation on each side, producing an obscurely tridendate condition; 
flagellum circular in cross-section, sensoria present, but not pro- 
ducing a rugose effect, the first funicle joint and pedicel, not 
greatly unequal; marginal vein no longer than thick............. 2 
Mandibles narrow at apex and plainly bidendate, with the inner 
tooth much longer than the other; flagellum oval in cross-section, 
densely covered with short linear sensoria, producing a marked 
rugose effect, the pedicel much smaller than the first funicle joint; 
wings very broad, strongly triangular in shape, the marginal vein 
about two or three times as long as thick. .Chrysoplatycerus Ashmead 
bo 
Scape, excluding radicle, a little longer than the pedicel and _ first 
two funicle joints combined, and only slightly widened beneath; 
wings rather broad and triangular in shape, the submarginal vein 
not thickened apically ...cso--... EME ote od 86M Zarhopalus Ashmead 
Scape, excluding radicle, no longer than the pedicel and first two 
funicle joints combined; distinctly, although not greatly, expanded 
beneath and concave on the outer surface; wings of about normal 
breadth and not at all triangular in shape, the submarginal vein 
slightly, but distinctly, thickened in the distal third of its course. 
Coelaspidia new genus 
Female. As compared with Chrysoplatycerus the head is thicker fronto- 
occipitally, the eyes much smaller so that the frontovertex becomes con- 
siderably wider, or about a third of the total width of the head; occiput 
deeply concave above, the occipital margin acutely, but not very sharply, 
angled; scrobal impression very deep and semi-circular, as in Chrysoplaty- 
cerus. Antennae similar as to the scape, but the flagellum is not laminate, 
it being much shorter, compressed and massively clavate, the cross-section 
of any part being oval, the joints all closely packed together; pedicel sub- 
