REVISION OF Srp:CIES OF THE fJENUS AdROTIS. 133 



cau in all cases be correctly refei-red with a sullicieiit material. I-'inally 

 come those species of which tessellata is typical, and which aj^ree in 

 always having the cell dark or black filled in well-marked specimens. 

 The transverse liues may be present or absent, but the ordinary spots 

 are always outlined in part, at least, by the intermediate black or dusky 

 shade. 



Tlie description of each jj^roup is very fully <;iven and excei)tional 

 characters are noted, I have left tlu^ full cliaracteri/ation to each, 

 even at the risk of some repetition, as 1 considered it well to have each 

 capable of standing alone. 



The synopsis of genera and groups renders another table unneces- 

 sary. 



Group WILSONII. 



Anterior tibia' spinose, rather heavily armed at tij). Front promi- 

 nent, tuberculate, rough. Antenuie S serrate and bristled, of the same 

 type as in allied groups. Thorax quadrate with iiuletinite, ijiconspicu- 

 ous tuftings. Primaries moderate, costa depressed, sligiitly concave, 

 aj)i(!es produced. This feature of the primaries is peculiar to the species 

 of this grou)). 



The genitalia of the S have the harpes short and rather broad, the 

 clasper bifurcate, the tines subequal and reaching almost to the tip of 

 the hari)es. The inferior branch of the fork is stiaight, regularly tai>ei- 

 ing to an acute point; the upper is more equal, slightly curved and not 

 acute at tip. 



Two species only belong to this group, closely allied, but yet easily 

 sejiarated. 



Wilsonii is a pretty, brightly marked species with pale ordinary spots 

 and distinctly paler yellow or red s. t. space : the t. p. line is distinct; 

 the s. t. line not marked. 



Lacunosa is closely allied, but darker, much more evenly colored. 

 The t. p. line is obsolete; but the s. t. line is distinct preceded by 

 black sagittate dashes. 



Nothing is known of the early stages of the species. 



In maculation and habitus this series is intermediate between the 

 quadriiientaia and tessellata groups, and resembles more particularly 

 the ochroijastcr series in the latter grouj). The i)eculiar wing form, 

 however, allows me to head the genus with this small series. 



Carneades -wilsonii Grt. 



1873. Grt., Huff. Hull., i, IX), i)I. 4, f. 3, Agrotis. 



1874. Grt., Butr. l?ull.,ii, 02, Agrotis. 

 spccialis Grt. 



1874. Git., r.nrt'. Bull., ii, 62, Agrotis. 



188-2. Grt., 111. Essay, r,4, pi. 2, f. 14, Agrotis. 



Fusco luteous to bright red of various intensity; costa to apex, nar- 

 row inner margin, and s. t. space paler luteous. Basal line marked in 

 cell, white, margined each side with a blackish shade. T. a. gendnate, 



