! S22 WILLIAM T. M. FORBES 



Hind wing with Sc and R wholly independent, but approximate 

 (Thyris, fig. 196) ; or fused (Dysodia, fig. 195) beyond middle of 

 cell; the other veins normally all arising separately; 1st A lost but 

 A strong. Cells open. 



The species of temperate climates agree with the preceding descrip- 

 9 ,ion, and are small, heavy-bodied moths with thick vestiture and 

 ^transparent discal spots. The tropical Rhodoneurinae are more slen- 

 <$er, with ample wings. They frequently have some radial branches 

 Sc and R of the hind wing are approximate beyond the end 

 the cell; and the cells normally are closed. They link the typical 

 .jtaembers of the family with the Pyralididae. 



i j( r Caterpillars (fig. 197) superficially Pyraloid, but more primitive 

 M .han any Pyralid in having three setae on the prespiracular wart of the 

 rothorax at least in some specimens (Fracker). Primary setaa only, 

 ead smallish, and normal; front reaching more than half way to vertex. 

 esothorax and metathorax with tubercle vii bearing two setas. Abdo- 

 with setse iv and v on a single tubercle, vii of two setas on first 

 seventh segments, and single on eighth. Ninth segment with a pre- 

 plate bearing setae i in front of, and slightly above, ii. Prologs 

 rather long, with a complete series of biordinal hooks. Spiracles 

 'oval. Caterpillars concealed feeders; immaculate, except for the 

 black chitinous parts. Pupa solidly obtect, not studied. 



The family is a wholly isolated and very strange one, combining 



I characters of the Pyralids and Macrolepidoptera with primitive feat- 



( ures. Its nearest relatives seem to be the tropical Hyblseidae. Fracker 



..has placed the group in the Tineid series; but it appears on the whole 



nearer the Pyraloids. 



"to 1. THYRIS Laspeyres 



,. Palpi obliquely upturned, with broad, bladelike second joint; male antennae 

 ^'prismatic and thick. Hind tibiae stout, with large, crowded spurs. Abdomen 

 odie'avily tufted at sides toward rear. Fore wing with R 2 and R 3 well separated. 

 jrHind wing with Sc and R separate (fig. 196). Larva with adfrontal sclerites even 



in width. 



Key to the species 



Fore wing marked with yellow 1. maculata. 



Fore wing black and white 2. lugubris. 



1. T. maculata Harris. Outer margin strongly wavy. Black. Stripes on abdo- 



YTH-en, a subterminal series of spots on wings, and scattered spots, all bright tawny 



.'yellow. A large, squarish, hyaline patch in the end of the cell of each wing, and 



a similar patch on inner margin of hind wing, sometimes fusing with the discal 



' one. 12-15 mm. (H 47:30.) 



./)'; End of May to July; not common and quite local in occurrence. Larva probably 

 ja stem borer or leaf-roller on clematis. 



Montreal, Ontario, to Montana; south to District of Columbia. New York: 

 Lancaster, Newport, DeBruce, Kingston, Poughkeepsie, Esopus, Long Island. 



