29 



closf'lv uiiik'd i>/ suhirc ; the recurved si>iiie iillaelied to i( is very lontr ;iinl 

 stout; tlio latorul daspers (/c.) are very Imitr, liroad, spooii-sliaiied. In Fifro- 

 phora divcrsUineata the armature is entirely diti'ereul. The end ol' tlie alxh)- 

 nien is hir<re, Inng, square, and nicnibranous. It conceals the armature, and 

 tiiC ends ol' (he claspcrs are oven with the end of the un inhraiie. ( )n 

 reuiovini( this, the ])ro|iortions of the ])arls are lunch as in /'. Inninil'i. l)ul 

 smaller; the lateral claspeis are narrower and soniewliat pointed, and the 

 supra-anal plate is shorter. 



In (jluHCoptcnjx polala, the genital armature is very didereni from that 

 oi' rctrophora truncata, so nnudi so as to allord excellent generic characlcrs; 

 and those who with Lederei- do not believe in separating the lower genera ot 

 the Larentince as done l)y lliil)ner, Stephens, Guenec, and others, would do 

 well to take into ccjusideration the excellent generic characters allbi'ded in 

 the mall! genital armature. 



In (1. po'ala, the lateral clas]>ers are very large ; the lower portion is large 

 and spatuhite, reaching as lin- beyond the supra-anal plate as in l^rlrapliora : 

 bat the middle is membranous, and, at what would corrcsiiond to the ni)per 

 edge in Fdrophora, becomes converted into a chitinous edge, which eiuls in a 

 long, acute spine; the upper edge of this shar[) chitinous portion has a deep 

 sinus at base, and the mucronate tip does not extend as tiir out as the tip of 

 tiie spatulate portion. Tlie chitinous portion at the tir.-t glanci' looks as it it 

 wei'e a separate appendage; but the lower edge on examination ai)[)ears con- 

 tinuous with the membranous s|)atulate portion. Tliis chitinous p:)rt:on docs 

 not appear to be representi'd in Petrophoni. The supra-anal plate is smaller 

 than in Pdrophora, and mendiriuious at base and in the middle, the edge 

 ibrminua broad rim, being solid and (diitinous. The recurved spine atiacheil 

 to it is very large. 



In (J.sabl.ul, there is also an upjjcr solid chitinous jjortion, which is I'nl 

 and ro.nide.l at the end, instead of pointed, and this portion is niiuh larger 

 than the niemi)ranous portion, projecting consideraldy beyond it, the expanded 

 rounded (uid encroaching^ on the membranous jjortion, and nuudi hollowed on 

 the lower ed^e, sli^ditly simH)Us on the upper and free edge. The supra-anal 

 plate is broad and solid, with no median suture, ami the end is sliLrhtly exca- 

 vated. Thus it seems that, while very ddrerent from G. polala, the two 

 ■species agree in having the upper edge of the lateral claspcrs solid and 

 chitinous. Though quite difl'erent in Ibrm from that of 6'. /W«fo, I should 

 still regard the dilVerences as sul)g(n)eric. 



