FAM. GEOMETRIDZE 145 
IO3. GeNUus CHRYSOCHLOROMA, WARREN 
Chrysochloroma. Warren, Novit. Zool. Vol. 3, p. 288 (1896). 
Characters. — Face smooth. Palpus in cf quite moderate, second joint densely scaled beneath, 
third joint in cf small, short-scaled, deflexed, in 9 long. Tongue strong. Antenna in Q bipectinate 
with long branches, apical part nearly simple; in Q nearly simple. Pectus densely hairy. Femora 
hairy. Hindtibia in c not dilated, terminal spurs unequal, medians rather approximated to the termi- 
nals, usually strongly unequal, the outer usually very small, sometimes wanting 1r). Abdomen not 
crested. Frenulum in cf rather strong. but arising before a basal expansion; in O vestigial, apparently 
sometimes wanting. Wings densely and opaquely sealed. Forewing broad, with costa very slhghtly 
arched (usually straight in middle). apex somewhat acute, at least in OQ, termen oblique, smooth, 
slightly curved (sometimes straight in anterior part), tornus rather pronounced, cell somewhat less than 
one-half, DC incurved, SC! usually free, bending twice, so as to approach successively C and SC?, 
occasionally with brief anastomosis at the points of approach, SC? normal, R! stalked 2), R? from clóse 
to apex of cell, M'connate or approximated; hindwing subquadrate, apex moderately pronounced, 
termen subcrenulate or nearly smooth, augled at R?, tornus pronounced, sometimes even slightly 
produced, inner margin long, cell short, DC straight or slightly curved, never extremely oblique, 
C approximated to cell for some distance, then rapidly diverging, SC? stalked, R? from close to R!, 
M! stalked (Pl. 3, Fig. 15). c genitalia : uncus pointed, with large socii; gnathos almost atrophied ; 
harpe angulated; cucullus pointed; penis pestillate (megaloftera). 
Early stages apparently undescribed. The larvze of C. megalopiera have been found by 
Mr. F. P. Dodd, in North Queensland, in the nests of the green tree-ant. 
"This genus, though probably akin to Gelasma, differs quite sufficiently to require separation. 
Apart from the presence of a vestigial Q frenulum, and perhaps rather greater strength of that of the c, 
which suggests a position less advanced in the genealogical tree, there are several minor points of 
distinction, although the structural variations in Gelasma naturally bring about, now and then, a nearer 
approach to CArysochloroma in one or another of them. The second joint of the palpus is stouter, densely 
scaled, but without separate frojecting hair-scales; the third joint in the cf is more deflexed, in the Q it 
is quite long, while it is rarely even longish in Gelasma; SC! of the forewing is on the whole more 
bicurved; R? of both wings arises quite close to apex of cell; the scaling is always dense and opaque in 
Chrysochloroma, nearly always less so — often quite fine and iridescent — in Gelasma; the cf hindleg in 
Gelasma is usually dilated with hair-pencil, in CArysocAhloroma this is not the case, but on the other hand 
there is a strong tendency to abortion of the outer median spur. 
'The resemblance of CArysochloroma to Orntlhospila, although it is superficially so considerable as to 
have misled Swinhoe (.Lep. Het. Oxford Mus. Vol. 2, p. 403) into sinking megaloftera to O. submonstrans (!), 
is not at all close structurally. 
Type of the genus : C/irysochloroma meekt, Warren (1896). 
1) There is certainly variability in this character, not only between different species, but within the limits of a single species; thus in 
megaloptera we have seen the spur almost entirely wanting or only somewhat shorter than the inner median; this is independent of sex. 
2) Turner (Proc. Linm. Soc. AV. S. Wales, Vol. 35, p. 6ro) says sometimes connate, and is too accurate an observer to be suspected of 
a mistake, but we think his observation probably refers to or£AoZes»a, which we do not place in this genus; it is hard to believe that in true CAyso- 
chloroma, with R? arising so near the apex of the cell, R! would be other than stalked, and we have certainly seen no exception. In Ge/asnma eumixis, 
which is a very close ally of orZAodes»:ia, we have observed R! sometimes connate. 
