April, ’20] 
BRITTON: CRAMBUS PRJEFECTELLUS 
223 
as Crambus prcefectellus Zinck., a native species which has not hereto¬ 
fore been recorded as injuring corn, though Mr. George G. Ainslie of 
the Bureau of Entomology, Cereal and Forage Crop Insect Investiga¬ 
tions, stationed at Knoxville, Tenn., who has studied this and allied 
Pyralids, informs me that he has records of prcefectellus being taken on 
corn in Florida, Arkansas and Tennessee, and on wheat in Indiana, 
but in no case was the injury of any extent or of any real importance. 
Prof. C. H. Fernald in The Crambidoe of North America, published in 
1896, states that the early stages and food plants are unknown. 
Mr. Ainslie states that there are few references in literature to this 
species, and most of them are systematic rather than economic. 
Apparently this is one of the first instances, perhaps the first, of any 
serious injury caused by this insect. 
The larva is about 12 mm. long, 2.5 mm. thick, dirty white to ash- 
gray in color, rather prominently marked with darker tubercles. 
Each abdominal segment bears eight tubercles: six in a transverse 
row near the anterior margin of the segments, the outer two being 
below the spiracles; two transversely elongated ones, just back of the 
middle two, but more widely separated. Prothoracic shield whitish 
and shining, marked with several small dark gray spots; anal shield 
peppered with dark gray spots. Head whitish, shining, mottled dor- 
sally with brown. Legs, prolegs and ventral surface, whitish. Each 
tubercle bears one or more hairs. 
The adult is a Pyralid moth having a wing-expanse of from 20 to 24 
mm.; fore wings brown with a longitudinal white band extending from 
the base but narrowing to a point before reaching the subterminal. 
There is also a darker brown dash extending from the subterminal to 
the apex, and nearly bisecting the apical angle of the fore wing, formed 
by white markings on each side. Terminal a darker brown line. 
There is a narrow, wavy, subterminal transverse line of darker brown 
whitish margined distally; between this line and the margin is a row 
of five small black elongated dots or short dashes. Fringe is light 
brown. Rear wings white, sometimes with a brownish tinge. Legs 
and antennae light browm. 
Adjournment. 
Morning Session, Friday, January 2, 1920, at 10.00 a. m. 
Vice-President A. G. Ruggles: You will please come to order. 
The first paper will be presented on the “Work of Empoasca mali 
on Potato Foliage,” by P. J. Parrott and R. D. Olmstead. 
5 
