60 Psyche [April 
32. Tympanic opening with a few exceptions conspicuous, lateral; Ist A wholly 
absent in both wings; Sc of hind wing sharply bent or much enlarged at 
base, almost always with a brace vein running across to base of frenulum 
most GEOMETRID A 
33. Sc and R of hind wing fused for a very short distance, then sharply divergent, 
separate from base, or connected by a weak cross-vein; tympanic opening 
INCONSPICUOUS. ssc). ee eke states lous elec see > ape ae eee ae eee 34 
33. Sc sharply divergent from R at extreme base, then sharply bent and touching, 
fusing or closely parallel to it or connected by a strong cross-vein,; tympanic 
opening’ conspicuous, lateral). 2). 3. sre oer hie a few GEOMETRIDZ 
34. Antenne notiscaled beyond) basalljomtbeer aarti) nae tyieiet late 25 
34. Antenne) closely scaled\ on upperside. ..-).462 02925 see eee 36 
35. Two anals; M: of fore wing connate or stalked with radial stem, CERATOCAMPID 
35. Mi separate from radial stem; with only one anal, or upper discocellular vein 
long and dongitadinal ieee ac cese vce cise ets che ae ey. cove ies SATURNIIDA 
36. Sc of hind wing sharply divergent from R from close to base.............. 37 
36. Sc and R parallel at base, connected by a weak cross-vein..............--- 39 
37. Ra: widely separated from R; all the way from cell to margin. . .. Lacosomip2 
87. Rs and R; arising from cell closely associated with Rs. ...............+.-- 38 
38. Rs and Mi: stalked or closely approximate at base, and separate from Rs 
Uraniide (Uraniine) 
38. R; separate from Rs, which may be stalked with Rs............. Lonomitide 
39. Frenulum about one-sixteenth length of hind wing. . Ewpterotide (Ewpterotine) 
39. Frenulum obsolescent, not exceeding humeral angle, or absent... Bombycide 
40. Cur of fore wing arising from cell about a third way out from base, or even 
nearer base; R; stalked with M:, with humeral veins in our species; no 
PROTA 3A oko ct oectc hee on ckass ere tare Ree Ee Te LasrtocaMPIDa3 
40. Cu: of fore wing arising well beyond middle of cell; usually with frenulum. .41 
41. Se and R of hind wing strong and parallel to beyond end of cell, and then ap- 
proaching very close or fusing a short distance................ DREPANIDS 
41. Se and R fusing before end of cell or wholly independent................. 42 
42. Fore wing with complete venation (twelve veins) all the radials, medials and 
cubitals arising separately, or with R2 and ; shortly stalked...... THYRIDIDA 
42. Rz and 4 or Rs and ; long-stalked or with some veins absent............... 43 
43. Se apparently absent (fused except at extreme base with R)...... SYNTOMID 
AS OCand He separating berore endsot celle nee eee eee eee tt 
44eeAntennse swollenstoward abipmacmmaerios ci icisee ere icke arcs AGARISTID 
A4 se Shattrolsantenne repulanlyataperiy eee mereecier i eae eet rire 45 
Ab’ Ocellatpresent rece 26 care Ae eee ES Oa Ty oe eek nee et ages te eee 46 
ADs ck OCCU L ASEME > ope. scare ire Casale oak Serkch ae Sac me a Ree gor eee eter amet 50 
46. Se and R of hind wing fused to middle of cell or beyond...... most ARcTIID 
46. Sc and R fused for more than a fifth length of cell, but the fusion not reaching 
THI Ge Ha Aes Fock res oe it is he erat aE ec cheer ai are eet en cee eee 47 
46. Se and R fused for less than a fifth length of cell, the fusion sometimes imper- 
TST C] et Pee BO eR COPS Jct in hs Ain ete Clee eens MRRNER ENT Seo orale) dicrcr 9% '¢ 48 
46. Sc and R connected by a strong cross-vein.............. a few Lymantriide* 
_*The Hypside, distinguished by the well developed tongue, are represented by an uniden- 
tified and aberrant species in the Barnes Collection. 
