476 - NEW YOEK STATE MUSBfOM 



wanders far from water. Oorydalis is usually crepuscular, and 

 is often attracted to lights at night. One large female was seen' 

 to make a flight of several rods, when apparently unmolested,, 

 on a bright, hot June day at 2 o'clock p. m. 



The adults are very short-lived, at least when kept in cages,, 

 and probably also when at large, judging from the short length 

 of the season when adults are to be found. Of the specimens 

 kept in cages, the males never lived longer than three days after- 

 emerging, while the females lived as long as eight or 10 days. 

 Kone could be induced to take food, and it is probable that the- 

 adults take no food. The studies made by Mr W. A. Riley and 

 others indicate that very little histolysis takes place in the- 

 digestive organs. This is explained by the probable fact that 

 these organs are not used in the adult insect. 



The dates on which adult specimens have been taken at Ithacai 

 range from June 4 to July 8, in a long series of years. 



TABLE TO SPECIES OF CORYDALIS 



a Hastate or lanceolate pale mark on middle of 



hind part of prothorax, irregular light marks 



each side 



6 Costal cells of front wings mostly with two 



white spots in each 



G Male appendages, upper pair, with the ends 



abruptly tunned under and back, appearing 



as a separate segment 1 i n a m a b i 1 i s-- 



cc Male appendages, with upper pair not abruptly 



turned backward 2cornut3i 



66 Costal cells of front wings with only one white 



spot in each Scognata. 



aa Hastate and other marks on prothorax of same 



color as the rest or nearly so 



6 Antennae with two basal joints and most of the 



others light yellow, onter three fourths with 



minute sharp teeth 



Front wings with no dusky clouds in cells, 



eXiCept neai- the stigmatal region; white dots 



almost wanting 4 c r a s s i c o r n i » 



oe Front wings with dusky and white clouds; 



white dots numerous except in costal region. . Speruviana 

 66 Antennae with basal joints. never yellow; seg- 

 ments of antennae never toothed 

 c Costal cells often with two white dots in each 

 d Front wings hardly clouded except in region 



of stigma 61utea 



