( 156 ) 



Key to the genera : 



n. Fore- aud midtibiae spinose 



,, „ „ not spiuose 



/j. riilvillns aliseut .... 

 „ present .... 

 e. Spnrs pbort, tongue short aud weak, 

 hindwirig arey .... 

 Spurs long, tongue half the length 

 of the body, hiudwiug rufous 

 i/. Foretibia armed with an apical 

 thorn : no pulvillus . 

 Foretibia without an apical thorn ; 

 pulvillus present 

 e. No parouychial lobes 



With two parouychial lobes at each side 

 /. Antennal segments distinctly dilated 

 laterally in dorsal view 

 Antennal segments not dilated later- 

 ally in dorsal view 



b. 

 (/. 

 XXXIX. riopliocnema. 

 c. 



XXXVIII. Sijnoeclm. 



XXXVII. Tetrachroa. 



XL. Dolbinopsis. 



e. 

 XLIII. Sphiiiqlii.us. 

 ■ ■ /■ 



XLII. Kentochrysalis. 

 XLI. Dolbina. 



XXXVII. TETRACHROA gen. nov.— Typus : edwanlsi. 



Macroslki, OUifE (>i07i Walker, 1856), Prnc. Linn. Soc. N. S. Wales (2). v. p. 515 (1890). 

 Meganoton, Kirby (now Boisduval, 1875), C'«(. Lep. Bel. i. p. 683 (1892). 



S ? . Tongue about half the length of the body, rather stout proximally, thin 

 distally. Pilifer with normal brush of bristles ; geual process triangular, as long 

 as the pilifer. Palpus elongate, projecting a little beyond frons in a dorsal aspect. 

 Antenna with end-segment about four times as long as basally high, clothed with 

 broad scales ; S : not strongly compressed, fasciculated eiliae about iialf as long 

 as the segments broad dorsally ; ? : cylindrical, eiliae all very short. Fore- and 

 midtibiae spinose ; foretibia ending in a long thorn, with some heavy terminal 

 spines, shorter (thorn excluded) than first tarsal segment ; spurs of mid- and 

 hindtibiae loitg, long terminal one of hindtibiae about four-fifths the length of the 

 first tarsal segment ; midtarsus without comb ; hindtarsns half as long again as 

 the cell of the hindwing, first segment much longer thau 2 to 5 together ; pulvillus 

 present, paronychium with two slender lobes at each side. Spines on abdominal 

 sternites very weak. 



(J. Tenth abdominal tergite elongate, divided at end into two short triangular 

 lobes, which are turned downward. Clasper without patch of modified scales ; 

 subdorsal fold very high, running ventrad at end, armed with spines (PL XXXIX. 

 f. 14) ; harpe elongate-triangular, densely covered with erect scales, dorso-basal 

 margin raised to a high ridge. Tenth sternite and penis-sheath not preserved in our 

 S sjiecimen ; clasper dorsally also damaged, the fold apparently with sjjines all 

 along the edge. 



¥ . Postvaginal part of vaginal plate membranaceous, short, scaled, antevaginal 

 part rather strongly chitinised, proximal edge of vaginal cavity convex, incrassate. 



