262 



BEUTENMULLER, MONOGRAPH OF THE SESIID^E. 



Bembecia marginata var. albicoma Hulst. 



Bembecia marginata var. albicoma Hulst, Bull. Brooklyn Ent. Soc. Vol. VI, 1883, p. 8 ; Beuten- 

 muller, Bull Am. Mus. Nat. Hist. Vol. V, 1893, p. 23 ; ibid. Vol. VIII, 1896, p. 119. 



Male. — Head, thorax, and abdomen deep sooty black with the markings very pale straw 

 yellow instead of golden yellow as in the type form. The markings on the thorax are very indis- 

 tinct and the first three segments are almost entirely black above, except for the very slight indication 

 of a yellow ring on the first and third segments. Legs heavily washed with black. Margins of 

 wings dark brown. 



Expanse : 23-27 mm. 



Habitat. — New York and New Jersey. 



Type : One male. Coll. Hy. Edwards, Am. Mus. Nat. Hist. 



The moths make their appearance in the fields from about the early part of 

 August to the middle of September. The eggs are laid singly on the canes of 

 blackberry and raspberry, near the surface of the ground or a little below. The 

 larvae infest the crown of the roots and lower portions of the canes, which they 

 burrow into or girdle more or less completely at its junction with the main root. 

 The smaller larvae run up the stems between the bark and wood. (Plate XXXV, 

 Fig. i.) Infested canes are usually dead and readily recognizable. During 

 the latter part of June the larvae seem to leave the old stalks and to attack the 

 new shoots. At the seat of the injury there is an enlargement of the cane, and 

 this gives room for the pupal cell. The head case of the pupa is provided with a 

 triangular, sharp-pointed, chisel-like process, used in cutting a way through the 

 bark. The larvae overwinter in the canes and roots in various stages of growth. 



Vespamima Beuten. 



Fig. 18. 



Vespamima Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VI, 1894, p. 87 ; ibid. Vol. VIII, 1896, 

 p. 119. 



Fig. 18. Anal Tuft, Hind Leg, Head, and Venation of Vesp 



amitita sequouz. 



