PuN. 23. IX. HYDRAENOMIA; DREPHALYS; PARADROS; LIGNYOSTOLA. By Dr. M. Drattdt. 881 



1922. "^ 



43. Genus: Hydraenomia Btlr. 



Contains 1 small species with a shorter antennal tip. The 3 rd palpal joint is thin, bare, porrect. 

 The distal margin of the forewing near the proximal angle somewhat concave. Costal fold present. The distal 

 margm of the hindwing is liliewise concavely indented below the middle and on the whole undulately dentate. 



H. orcinus Fldr. (= albicuspis H.-Schaff.) (171 c). Above brown, at the base and margin black orcinv.s. 

 with 2 darker transverse bands bordered by large and small hyaline spots on both wings. Beneath the hind- 

 ■ndng is almost white with 3 black transverse bands parted by the light veins. South America. 



44. Genus: Dreplialys Wts. 



The chief mark of this genus based upon one single species consists in the lower median vein of the 

 hindwing rising close at the lower cell-angle. The cJ shows a costal fold; the border of the wings is entire, 

 the hindwuig at the anal angle produced into a triangular point. 



D. helixus Hew. (173 a, b). Above dark brown, at the base haired yellowish-green, on the forewing with helixus. 

 4 large and 3 minute hyaline spots, on the hindwing with 2 yellowish macular transverse bands. Beneath 

 the hindwmg shows a broad, white discal band on a lilac-grey ground, reaching neither the costal margin 

 nor the proximal margin. From Panama. 



45. Genus: I*araelros Wts. 



Allied to the following genus and also closely approximating Hydraenomia. Chiefly distinguished by 

 the prolonged hindwings with an entire margin. On the forewing the lower median vein ri.ses close at the base. 

 The antennae are longer than in Lignyostola. 



P. phoenice Hew. (171 d) is above blackish-brown with numerous white spots, yellow on the hindwing. phoenice. 

 Beneath the hindwing is yellowish-grey in the basal part, m the distal part violettish-grey, between the two 

 ■colours with a black transverse line. Costal margins orange-yellow. Brazil. 



P. eous Hew. (171 d) is smaller, above very similar, but on the hindwing the yellow spots are reduced, eous. 

 in the middle there is only an oval transverse spot. Beneath quite different, on the hindwing reddish-bro-svn 

 with a large, reddish-white transverse spot and a smaller, almost square spot in the black anal angle. From 

 BrazU (Para). 



P. alcmon Cr. (171 d) differs by its white hindwing with a broad black border, also beneath coloured alcmon. 

 and marked the same. Guiana to Brazil. 



P. oriander Hew. is above dark reddish-brown, on the forewing with 2 cellular hyaline spots, 2 behind oriander. 

 them and 3 subapical spots ; near the proximal margin there are 2 yellow spots ; the hindwing shows 2 trans- 

 verse bands, each of 3 yellow spots. Forewing beneath the same, but at the apex lighter reddish. Hmdwing 

 reddish-brown with a round orange-yellow central spot and 2 similar spots near the proximal margm behind 

 the middle. Anal angle black. Expanse of wings; 1.9 inches. Amazon. 



P. formosus Fldr. (171 e) entirely resembles phoenice above, but beneath it is quite different, in formosus. 

 the larger distal-marginal and costal-marginal half violettish-brown or cherry-brown, at the base and proximal 

 margin yellowish, at the anal angle black with a round white postcellular spot terminating in the $ like a band 

 into the proximal margin. Widely distributed from Panama to Brazil. 



P. dumerilii Latr. (171 e) looks very much like formosus, but the white hyaline spots are larger, the dumerilii. 

 yellow median band of the hindwing is distally concave. The hindwing beneath is dark brown in the q, bluish- 

 grey in the $, distally tinted violet, only at the proximal margin yellow, instead of the white central spot there 

 are the yellow spots of the upper surface, in the $ much lighter, almost whitish-yellow. From Surinam. 



46. Genus: liigiiyostola Mab. 



Antennal club moderately thick, uniformly bent and finely pointed. Palpi porrect, dehiscent, with 

 a slender bare terminal joint. The cell of the forewing is longer than two thirds of the costal margin; the lower 

 median vein does not rise so near at the base as in Paradros. Hindwing decidedly lobate, the distal margm 

 before it somewhat excised. Costal fold present. Posterior tibiae densely fringed with 2 pah of spurs, the upper 

 pair short. Half a dozen species from Tropical America. 



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