March, 1906.] SMITH : NEW NOCTUID^. 15 



nevertheless remains yet somewhat unsatisfactory because of the in- 

 adequately described Strecker species. The result of this study showed 

 an unexpectedly complete series of the described forms and a large 

 series of new species, which are herewith presented. That there will 

 be further additions is certain, because many species are local and 

 every new region will, almost inevitably, turn out new forms. Besides 

 being local, many of the species are also solitary, individual examples 

 being taken only at long intervals. For that reason it seems likely 

 that few cabinets will have a good representation until all the locali- 

 ties have been well collected over. 



I have accepted Hampson's separation of Schinia and Lygrati- 

 thcecia but do not follow him in his suppression of Heliothis in the 

 sense heretofore used : in fact I follow none of the changes made by 

 him and based on the " first species as type " rule. 



Heliothis niveicosta, new species. 



Ground color rather bright luteous, due to a whitish wash over a darker ground. 

 Head and base of collar paler, tending to whitish on front. Primaries with costal 

 region whitish, becoming white before the t. p. line, and cut before the apex. There 

 is an obscure wash of whitish over the submedian vein, best marked in the median 

 space and cut off at t. p. line. T. p. line diffuse, pale, well removed toward outer 

 margin, obliquely sinuate from costa near apex, to inner margin one third from hind 

 angle. S. t. space is the darkest part of the wing, followed by a narrow paler terminal 

 space. Fringes of ground color at base, outwardly paler. Secondaries yellowish 

 white, a little smoky, with a blackish discal spot and an outer band which is inter- 

 rupted by a whitish blotch near middle of margin. Beneath, primaries blackish, with 

 a narrow costal and inner, a broad outer pale border and a diffuse discal blotch. 

 Secondaries whitish with a discal dark lunule. 



Expands. — 1.15 inch = 29 mm. 



Habitat. — Southern California. 



One female in not the best condition, received years ago from Dr. 

 Barnes, numbered 154. Indications are that the male may belong to 

 the series in which there is a costal dilation, making it a Heliocheilas. 

 Unfortunately the specimen contains no indication as to time or exact 

 locality of capture. 



Thyreion stena, new species. 



Head and thorax very pale citron yellowish, abdomen blackish with fine whitish 

 vestiture that interposes a film over the dark ground. Primaries very pale lemon yel- 

 lowish with a pink shade extending from base parallel to costa to the s. t. space ; 

 another, from same point extending through submedian interspace to anal angle, and 

 a connecting shade through s. t. space which does not reach the costa but does reach 

 the inner margin at anal angle. A pinkish shade over basal area generally. Fringes 



