99 



one, or more than one-half, have been published within that period. 

 Of the remaining fifty-one, twenty-one were described by Boisduval 

 in his paper on the Lepidoptera of California, in 1852 ; previous to 

 which time very few species (not over twenty-five) were known to 

 inhabit the United States. 

 Cambridge, Mass., Feb. 29, 1876. 



Table for the Determination of the GEi^ERA—Co?itimied. 



Note. — The student is requested to correct the followin;? errors which were OAerlooked in 

 the table of Purt I (Bulletin, Vol. II). p. 23t) ; the tirst part of category 20, should read fo?-e 

 wings instead . of both wings. P. 237 ; the second part of category 42, should read gently 

 curved instead 6f greatly curved. 



63. Fore tarsi of males destitute of spines beneath ; upper surface of wings 

 ornamented either with black-edged white spots or with metallic 

 lines (Vestales) 64. 



63. Fore tarsi of males densely spined beneath ; upper surface of wings never 



ornamented as above (Plebeii) 65. 



64. Upper surface of Avings marked with many delicate parallel transverse 



lines Caleplielis. 



64. Upper surface of wings marked with conspicuous black-edged white 



spots Chrysobia. 



Go. Subcostal nervure of . >re wings emitting two superior nervules 66. 



65. Subcostal nervure of ; re wings emitting three superior nervules. . . . 78. 



66. Antennae increasing so regularly in size as scarcely to show the limits of 



the very long club ; stalk uniformly dark Eumaeus. 



66. Antennal club perfectly distinct ; stalk generally annulate with white. . . 



(part of Ephori) 67. 



67. Hind wings without any threadlike tails, but sometimes lobed 68. 



67. Lower median nervule of hind wings terminating in a threadlike tail. 73. 



68. Inner border of hind wings rather conspicuously excised, the anal angle 



with an inward directed lobe (often falling downward) GO. 



68. Inner border of hind wings but little or scarcely excised, the anal angle 



not lobed 71, 



69. Hind wings rounded ( 5 ), or produced at the anal angle, so that the hind 



and inner border form less than a right angle (^) Strymon. 



69. Hind wings of similar shape in the two sexes 70. 



70. Under surface of wings brown Ilicisalia. 



70. Under surface of wings green Callophrys. 



71. Male with a discal stigma on fore wings ; inner margin of hind wings of 



both sexes distinctly excised Xallipsyche. 



71. Male without discal stigma; inner margin of hind wings scarcely at all 



excised in either sex 72, 



72. Upper surface wholly brown ; cell shorter than fore wing. . . .Satyrium. 

 72. Upper surface more or less blue ; cell longer than fore wing Erora. 



r-c 



