3IO ENTOMOLOGICAL NEWS. [July, 'l/ 



bryonic organ is formed by a proliferation of hypodermal cells, 

 which are ectodermal in origin. 



BIBLIOGRAPHY. 

 BERLESE, A. 1909. Gli insetti : loro organizzazione, sviluppo, abitudini 



e rapporti coll'uomo. Milano. p. 709. 

 BONGARDT, J. 1903. Beitrage zur Kenntnis der Leuchtorgane ein- 



heimischer Lampyriden. Zeit. fur wiss Zool. LXXV : 1-45. 3 Taf. 

 DUBOIS, R. 1898. Lecons de physiologic generale et comparee. Paris. 



pp. 301-317- 

 LEYDIG, F. 1857. Lehrbuch der Histologie des Menschen und der 



Thiere pp. 342-344. 

 OWSJANNIKOW, P. 1868. Ein Beitrag zur Kenntniss der Leuchtorgane 



von Lampyris noctiluca. Mem. Acad. Sci. St. Petersb. XL No. 



17, p. 12. pi. i. 

 SCHULTZE, M. 1865. Zur Kenntniss der Leuchtorgane von Lampyris 



splendidula. Archiv. fiir mikr. Anat. 1 : 124-137, 2 Taf. 

 VOGEL, R. 1912. Zur Topographic und Entwicklungsgeschichte der 



Leuchtorgane von Lampyris noctiluca. Zool. Anz. XLI : 325-332. 

 WHEELER, W. M. 1892. Concerning the "blood tissue" of the Insecta. 



Psyche VI. p. 255. 

 WHEELER, W. M. and WILLIAMS, F. X. 1915. The luminous organ of 



the New Zealand glow-worm. Psyche XXII: 36-43 pi. i. 

 VON WIELOWIEJSKI, H. 1889. Beitrage zur Kenntnis der Leuchtorgane 



der Insecten. Zool. Anz. XII : 594-600. 

 IBID. 1890. Contributions a 1' histoire des Organes Lumineux chez 



les Insectes. Bull. Sci. Fr. Belg. XXII: 166-172. 

 WILLIAMS, F. X. 1916. The photogenic organs and embryology of 



Lampyrids. Jour. Morph. XXVIII : 145-207. pi. 10. 



An Active Ant-killer (Arach., Solpugid.). 



April 25th of this year, Mr. Frank B. Richardson, of San Diego, 

 Texas, sent me a specimen of an interesting Solpugid, Ercmobatcs 

 magnus (Hancock), which was determined by Mr. Clarence R. Shoe- 

 maker, of the National Museum. Mr. Richardson found the specimen 

 destroying large sized ants. He took it to an ant hill, and in a few 

 minutes it killed "hundreds of ants." Mr. Richardson pointed out 

 that these ants are a great pest at San Diego and especially to freshly 

 planted seeds. He stated that they had carried away about 20 pounds 

 of grass seed which he recently sowed. He further stated that he 

 would very much like to "promote the multiplication" of this import- 

 ant ant enemy. L. O. HOWARD, U. S. Bureau of Entomology, Wash- 

 ington, D. C. 



