March, 1917.] FoRBES : HydRIOMENIN^ OF THE UnITED StATES. 55 



No hair-pencil {Talledega). 



montanata, magnoliatoidea, canavestita. 



Mysticopfera is similar to the typical group of Lohophora but with 

 a single accessory cell (Europe), Trichopterygia has a very large 

 single accessory cell, R. and M^ stalked even in the male, and trans- 

 lucent hind wings. 



There are a number of exotic genera connecting this series with 

 the preceding genera on the one hand, and with the central Coenocalpe 

 group of Hydriomena on the other. 



Microloha (Tyloptera n. b. 1.), from eastern Asia has 2/3 pec- 

 tinate antennae in both sexes, one small ace. cell, lobe much reduced 

 and both cubitals apparently lost, as in Heterophleps. The position 

 of the discal dot shows that it is a posterior vein, and not R that is 

 lost {M. hella). 



In Crocypus (S. Am.) the lobe is slender, bearing long hair, mdcv 

 of hind wing long and bent, front and wing-vestiture as in Operoph- 

 tera (C. perlucidaria). 



Erateina is a large genus from South America, forming the connec- 

 tion between Hydriomena and Coronidia, except for the male struc- 

 tures. Frenulum absent, mdcv. bent, often extremely long, one small 

 accessory cell; hind wing typically with a large lobe, folded under in 

 the male, which becomes reduced to a slight thickening and crimping 

 of the inner margin in species approaching Trochiodes. The fol- 

 lowing species were seen — some of which may really be merely fe- 

 males of others as the sexes are strikingly different in wing form and 

 have often been described as distinct: leptocircata, herbertina, dnicei, 

 undulata, zoraida, staudingeri, rosina, sinuate, delineata, pusaria, 

 aroma, cometaria, lineata, artahates, flaventia, dmazonia (v. immacu- 

 lata), artemis, trisectistrigata, rhesa, linda, catenata, hyaloplaga, rog- 

 ersi, siliquata, dilectaria, specularia, radiaria, substriata, cynthia, 

 coeruleopicta, obscura, cornclia, proana, inexpectata, masura, sub- 

 sagittata, and peloria. 



Trochiodes is practically like the last group of Erateina, but the 

 anal angle of the hind wing is shortened and there are two ace. cells, 

 some species have a hair-tuft in the cell of the fore wing. Pohliata, 

 lithosiata, cyris, cachara, prusa and pramenea were seen, all from S. 

 Am. 



RJwpalista and Hammaptera have more or less the appearance of 



