1915] Dohanian — External Anatomy of Borcus briimalis Fitch 123 



short, erect hairs; hind wings degenerated into microscopic dots of the same shape 

 as fore wings. 



Male. Length 2. 50-2. 85mm. Antennte 23-, sometimes 24-jointed. Frontwings 

 1.7 mm. long, O.-i mm. wide at base when laid open flat; coriaceous; gradually 

 narrowing toward the tip from which there issues a long, thorn-like spine; upper 

 surface metallic, lustrous, sparsely pubescent; prominent spines issue from both 

 sides of the trough-shaped wing into which the long, slender, chitinous hind wing 

 fits snugly. Hind wing almost a bristle, its extremely sharp tip scarcely projecting 

 beyond that of the fore wing; underside with a thick row of white, woolly pubes- 

 cence; upper surface glabrous. Abdomen cylindrical, comparatively broader than 

 in the female; the last four segments crowded dorsally and broadened ventrally 

 so as to allow the genitalia to recurve upon the back, and the two prominent, stout, 

 sharp-pointed hooks, each with an acute tooth in the middle of its inner edge and 

 pilose along the outer edge, to point toward the head. 



LITERATURE. 



1. Fitch, Asa. Winter Insects of Eastern New York. Amer. Journ. Agric, Vol. 



V, pp. 275-277. (1847.) 



2. Trans. Entom. Soc. London, 2d series. Vol. I, p. 96. (1850.) Reprint of ref- 



erence No. 1. 



3. Lintner, J. A. 2d Rep't Ins. New York, pp. 237-238. (1885.) Reprint of ref- 



erence No. 1. 



4. Hagen, H. A. Neuroptera of North America. Smithsonian Misc. Coll., Vol. 



IV, p. 240. (1862.) 



5. Brauer, F. Beitrage zur Kenntniss der Verwandlung der Neuroptera. Verh. 



Zool.-bot. Vereins, Vol. VII, pp. 69-70. (1857.) 



6. Packard, A. S. Taste Organs and Olfactory Rods. Psyche, Vol. V, pp. 160- 



164. (1889.) 



7. Packard, A. S. Catalogue of the Phalaenidfe of California. Proc. Boston Soc. 



Nat. Hist., Vol. XIII, p. 408. (1871.) 



8. Hine, J. S. A Review of the Panorpidse of America North of Mexico. Bull. 



Dennison Univ., Vol. XI, pp. 254-256. (1901). 



9. Cockle, J. W. The Mating of Boreus californicus. Canadian Entom., Vol. 



XL, p. 101. (1908.) 

 10. Cobelli, R. de. Kleinere Original-Beitrage. Zeits. wiss. Insektenbiol., Vol. 

 IX, p. 132. (1913.) 



EXPLANATION OF PLATE 9. 



Boreus brumalis Fitch. 

 Fig. 1. Dorsal view, female. 

 Fig. 2. Wing of male. 

 Fig. 3. Front view of head. 



