IIESPEUIDI : TIIAMAOS BlUZO. 



1503 



of the lower surface (lepomls a very lai'se, appressed tooth, the anterior edge nearly 

 straijiht, the posterior cnirvod sinnonsly forward, as .seen from the side ijroad and 

 well ronnilcd, tlie posterior surface liaving tlie eilire oniarninate, and furnished with 

 a sli^lit median ridge. Lateral arms extremely broad at origin, tapering very rapidly 

 in a downward direction, becoming slender before the lowest point is reached, and 

 then remaining of nearly tlie same size; below bent squarely at right angles bacltward, 

 pursuing a straiglit horizontal course for lialf the distance to the tip, then curving 

 inward and upward, expanding a little at the united tips, and bearing the inferior 

 armature of minute raised points — not very distant from tlie pads at the base of the 

 terminal liool^s. Left rlitsji : Main Ixidy large and gibljous, its base slender. Iiroadening 

 pretty regularly, nearly straight in projection. Blade broad at base, narrowing rather 

 rapidly in tlie basal half, beyond i)retty uniform, the tip rounded and thickened, but 

 oblifiuely docked ; basal process directed horizontally backward, bent or curved at 

 base inwardly, twisted very slightly, with atendeney to bring the inner side uppermost ; 

 the whole upper edge is armed with minute recurved denticulations, extending as far 

 as the tip, and on the apical third forming a double row of minuter teeth; the basal 

 process is a rather sm.all rounded lobe, whose gener.al direction is upward, at right 

 angles to the blade, curving a little inward, and having one edge a little concealed by 

 the minute hind process of the lobe ; its whole outer edge is covered by recurved den- 

 ticulations, in continuation of those on the blade; the terminal portion of the outer 

 surface is also minutely spinulate. Upper process of lobe directed upward, curved 

 inward and tliickcncd a little above, its edge showing indications of obsolete denticu- 

 lations. Bight clasp : Main body similar to that of the opposite side, excepting that 

 it is much broader at the base — nearly as broad as anywhere. Blade short, about half 

 as long as the opposite clasp, broad, compressed, tlie basal half narrowing somewhat, 

 the tip rounded and scarcely excised, the armatui-e as on the opposite clasp; basal 

 pi'ocess similar to tlie opposite, but smaller and twisted, so that its inner surf ace is 

 directed backward and a little inward, and this face, in.stead of the outer, is furnished 

 with spinules ; the border is armed as in the opposite jiiece, but the basal border is free 

 from, although concealed by, the lolie. Each of the processes of the lobe is simple 

 and broadly I'ounded, the hinder scarcelv the larger. 



Described from 36? , 139 . 



Accessory sexual peculiarities. The costal fold of the fore wing of the male 

 (45 : 2-3) is mainly filled with a dense mass of amber-colored, rod-lilve bristles (47 : 7e), 

 largest near the base and delicately tapering, about .18 mm. long, seated on the costal 

 vein, sometimes erect and sometimes recumbent; while actually homologous to the 

 apple-seed or scaphiform androconia of the preceding species, they are greatly elon- 

 gated and appear to function for the pedif orm bristles which are wholly wanting : the 

 basement field below the costal vein is filled with similar but much shorter amber- 

 colored bristles (7 d), which are apparently more flexible; there are Isesides many 

 stiff and slender, horny bristles (7f) which are about 5 mm. long; and a very few 

 slender and rather short chain-bristles, or perhaps more properly twisted ribbons (7 a) 

 next the lower edge ; cover-scales (7 b, c) of varying sizes _and shapes [occur at the 

 two edges. 



Egg (66: 12). Fifteen longitudinal ribs, .17 mm. apart, pretty straight, thin, uni- 

 form, rather sharp, the very edge rounded, raised above the lowest portion of the 

 space between them .025 mm. Cross lines very delicate, crossing the ribs, .025 mm. 

 apart; surface very delicately sliagreened with multitudinous, excessively minute 

 raised points. Micropyle rosette (69 : 4) .127 in diameter, the lines bounding the cells 



