THE GENERA OF TIIECLIDI. 801 



Table nfyenern of TIteclidi, based on the et/g . 



Promiiiencos riosply appi-oxiiiuito, iit least as close as onc-twcntieth the diameter of the egg. 



Egg more than twice as liroail as high Erora. 



Egg less than twice as liroail as liigli Urauotes. 



Prominences distant, not nearer than one-eight llie diameter of the egg Mitura. 



Prominences at a medium distance apart, from oiic-tcnth to one-eighteenth the diameter of the 

 egg. 



Egg more than twice as broad as high Inclsalla. 



Egg less than twice as broad as high. 



Summit of egg broadly domed almost throughout Strymon. 



Summit of egg flat for at least half the diameter of the egg Theclal 



Table of genera, based on the caterpillar at birth. 



No hair-bearing series of papillae between the spiracles and the series on the latcrodorsa 

 ridge. 

 Each abdominal segment with only one large and one small papilla in the latcrodorsa 

 series. 

 Third thoracic segment with a naked papilla on lateral line; the two smaller adjacent 



papillae of last compound segment one behind the other Thecla. 



Third thoracic segment with no lateral papilla; the two smaller adjacent papillae of 



last compound segment placed transversely Strymon . 



Each abdominal segment with two large papillae and one small papilla in the laterodorsal 



series Incisalia. 



A laterostigmatal series of hair-bearing papillae Mitura. 



(Erora and XJranotes unknown.) 



The materials for a table based on the mature caterpillar are not at hand. 



Table of genera, based on the chrysalis. 



A delicate dorsal carina on prothorax and mesothorax Incisalia. 



No distinct dorsal carina. 



Abdomen much wider than thorax ; hair-bearing papillae conical. 



Raised tracery of lines on surface low and obscure ; longest hairs nearly half as long 



as segments Uranotes. 



Raised tracery of lines on surface distinct and sharp ; longest hairs not one-fourth the 



length of segments 9Iitura. 



Abdomen scarcely wider than thorax; hair-bearing papillae hemispherical Thecla. 



(Strymon and Erora not examined.) 



Table of genera, based on the imago. 



Hind wings without thread-like tails, at most lobed at some of the nervure tips. 



Hind wings of very different shape in the two sexes, the outer margin not crenulate ; male 



with a discal stigma on th(^ fore wing Strymon. 



Hind wings not greatly ditfering in form in the two sexes. 



Hind wing with no excision of the inner margin, the outer margin not crenulate; male 



with no discal stigma Erora. 



Hind wing with a considerable apical rounded excision of the inner margin, producing 

 a conspicuous lobe at the inner angle, the outer margin crenulate; male with a dis- 

 cal stigma on fore wing Incisalia. 



Hind wings with one or two thread-like tails. 



Submedio-internal interspace of hind wing apically lobed ; tail of lowest median uervule 



a third as long as the wing; male with no discal stigma on fore wing Uranotes. 



Submedio-internal intersp.ace of hind wing not apically produced ; tail of lowest median 



nervnle less than a fourth the length of the wing ; male with a discal stigma on fore wing. 



Antennae comparatively short, the club short and stout, nearly three times as thick as 



the stalk and only five times as long as broad Mitura. 



Antennae comparatively long, the club long and slender, scarcely twice as thick as the 

 stalk and eight times as long as broad Tliecla. 



101 



