LEPIDOPTERA OF NEW YORK AND NEIGHBORING STATES 611 



beyond), not running closely parallel to lower side of cell. M, and M 3 more or less 

 stalked. Cell moderate (for example, Acrobasis, fig. 378). 



(3) Discocellular very strongly curved, its lower part approximate to the lower 

 side of the cell for a greater or less distance before the origin of Cu,. making Cu, 

 appear stalked (for example, Dioryctria; Xephoptervx) . The group may he divided 

 into two subtypes; a, in Dioryctria (fig. 379), Ulophora, and Monoptilota, Cu, sepa- 

 rates from the cell at a third of the length of the wing; b, in most of the other 

 genera it separates two-fifths way out (fig. 380). 



(4) Discocellular practically straight and transverse, a little broadened, and 

 not tubular (M 2 lost) (fig. 388). 



Many genera which have lost M, show a condition intermediate between types 

 (2) and (4) (fig. 386). 



Key to genera, 



1. Hind wing with all veins present, or with Sc weak (Cu apparently 4-branched) ; 

 fore wing with all veins present (except the missing radial characteristic 

 of the subfamily). 



2. Male antennae notched and unipectinate . , 78. Monoptilota. 



2. Male antennae not unipectinate. 



3. Palpi upturned or recurved, the last joint rarely porrect. 

 4. Discocellular of type (2) (fig. 378). 

 5. Male antennae simple. 



6. Fore wing with M 2 and M 3 stalked 74. Myelois. 



6. Fore wing with M 2 and M 3 separate 74. Rhodophaea. 



5. Scape of male antenna strongly dilated or angulate at apex; rarely 



with a process much as in the Epipaschiinae 75. Acrobasis. 



4. Discocellular of type (3) (figs. 379, 380). 



5. Eyes small; palpi with first two segments long-hairy below. 



81. Polopeustis. 

 5. Eyes normal; palpi scaled. 

 6. Male antennae practically straight, but a little thickened with 



scales; palpi scaled, maxillary palpi without plume. 

 7. Cu 2 of hind wing arising one-third way out (fig. 379). 



8. Maxillary palpi of male flattened, closely appressed against the 



front 76. Ulophora. 



8. Maxillary palpi of male filiform 77. Dioryctria. 



7. Cu 2 of hind wing arising two-fifths way out. 



8. Maxillary palpi flattened, closely appressed against the face. 



79. Glyptocera. 



8. Maxillary palpi filiform 82. Ambesa. 



6. Male antennae more or less, usually strongly, curved at base, with 

 a tuft of scales filling the concavity; maxillary palpi usually 

 plume-like; Cu 2 arising from cell two-fifths of the way to margin 

 of wing. 

 7. Maxillary palpi filiform; labials without groove. 



8. Fore wing with M, and M 3 stalked 80. Tacoma. 



8. Fore wing with M., and M 3 approximate. 



9. Fore wing smooth-scaled 83. Nephopteryx. 



9. Fore wing with a scale ridge 84. Tlascala. 



7. Maxillary palpi plume-like; rarely, forming a scaly tuft, enclosed 



in a groove in labial palpi. 



8. Fore wing with It, shortly stalked, M 2 and M 3 stalked or con- 

 nate; hind wing usually with Cu t apparently stalked. 



85. Meroptera. 



