I 



NO. 7 THE GOLD-BANDED SKIPPER CLARK 47 



When the butterfly emerges, the pupa spHts first along the suture 

 running between the posterior ends of the bases of the antennal 

 sheaths, then along the inner edge of the antennal sheaths, and finally 

 down the middle of the thorax dorsally. Three pupae were broken 

 open in the same way. 



In Epargyrens titynts the escape of the butterfly is made after the 

 same fashion, except that the second rupture is down the outer side 

 of the antennal sheath instead of down the inner side. Thus in empty 

 pupal cases of Rhabdoides celliis the antennal sheaths remain attached 

 to the inner edges of the wing cases, whereas in empty pupal cases of 

 Epargyreus tifyrus they remain attached to the midtibial sheaths. 



PARASITE 



From one of the caterpillars a tachinid larva emerged and immedi- 

 ately pupated. In a few days the adult emerged from the pupa. 

 Charles T. Greene was so kind as to identify this for us. It proved to 

 be an example of Achaetoneura olctiae (Riley). 



KEY TO THE EGGS OF RHARDOIDES AND RELATED GENERA 



a\ Egg regularly domed above, with no portion truncate ; vertical ribs at least 

 15 (15 to 21) in number. 



h^. Vertical ribs very fine and low, becoming higher and conspicuously 

 beaded above the middle of the egg ; a broad area about the micropylar 

 basin occupied by a large meshed and conspicuous reticulation in which 

 the ribs and the widely spaced cross lines are smooth and of the same 

 height and character. 

 r\ With 15 to 21 (usually 17 or 18) vertical ribs; egg nearly as high 



as broad Rhabdoides. 



c'. With about 15 vertical ribs ; egg a fourth broader than high. 



Thorybes. 

 fc^ Vertical ribs high and conspicuous, not increasing in height above the 

 middle of the egg ; alternate ribs run to the micropylar basin ; no con- 

 spicuous reticulation about the micropylar basin, the ribs and fine cross 



lines continuing directly to it Epargyreus. 



a^ Egg broadly truncate above over an area about equal in diameter to half the 

 width of the egg; vertical ribs not over 15 in number. 

 b^. With at most 12 vertical ribs ; egg one-eighth again as broad as high. 



Goniiirus. 



b'\ With more than 12 vertical ribs; egg one-fourth again as broad as 



high Achalartis. 



