BEUTENMULLER, MONOGRAPH OF THE SESIIDvE. 



265 



wings opaque, metallic blue or green black with discal mark somewhat deeper in color. Hind 

 wings thinly covered with blue black scales ; outer border very narrow, blue black. 



Female. — Same as the male. 



Expanse : Male and female, 28-30 mm. 



Habitat. — Canada, New York, New Jersey, New Hampshire. 



Types : Male and female. Coll. D. S. Kellicott. 



Larva. — " Normal (S. exiliosa). Lower posterior ocellus not only pigmentless but without cor- 

 nea. Head dark brown, uniform, labrum centrally, spot at base of antennae and clypeal sutures 

 black; sutures between paraclypeal pieces and lobes pale. Epicranial lobes meet only in a point. 

 Second annulet highest ; feet with short ellipses of crochets, 6 to 8 in a row. Length, 26 mm." — 

 (Dyar, MS.) 



The larvae inhabit the pines and spruces, boring in a tortuous manner under 

 the bark and into the superficial layers of wood. From the wounds thus made, 

 pitch exudes, forming hemispherical masses over the burrows. (Plate XXXIV, 

 Figs. 4 and 5.) In these masses, which are from three to four inches in diameter, 

 the pupae cells are finally formed. According to Kellicott, the larvae occur more 

 frequently than elsewhere just below a branch, or sometimes about the border of a 

 wound made by the axe, or where a limb has been broken off by the wind. They 

 are rarely met with in the axils of the branch. The insect appears to attack large 

 trees and frequently at considerable altitude, sometimes from thirty to forty feet 

 from the ground. Before transforming the larvae prepare a cell lined with silk 

 in the exuded pitch in which the pupal stages are passed. While in their bur- 

 rows the larvae move through the soft pitch with impunity, but if removed from 

 it they soon die from the encumbrance of the hardening pitch adhering to them. 

 They form their pupae during the latter part of May and in June; the moths 

 appear from about the middle of June to July or August. 



Sanninoidea Beuten. 



Fig. 20. 

 Sanninoidea Beutenmuller, Bull. Am. Mus. Nat. Hist. Vol. VIII, 1896, p. 126 ; ibid. Vol. XU, 

 1899, p. 160 



\!\V> 



Fig. 20. Hind-leg, Venation, Head, Anal Tuft of female and male of Sanninoidea exitiosa. 



