ART. 10 NORTH AMERICAN" TACHINID FLIES WEBBER 17 



the horizontal axis. The species is further characterized in that 

 there are two generations, the host larvae being attacked in their in- 

 termediate and later stages, the maggot hibernating in the third 

 stage, and the adult emerging in the spring or early summer. It is 

 rarely recovered solitarily from its host species. 



Described from 25 specimens of both sexes reared at the Gipsy 

 Moth Laboratory, from Samia cecrofia Linnaeus, by J. V. Schaff- 

 ner, jr., and others. The type (G. M. L. 12119 H4a) is from Glen- 

 born, Me. (Carmel, Me., February 3, 1923) ; emergence date under 

 laboratory conditions, March 1, 1923. The allotype (G. M. L. 12119 

 Hlb), Carmel, Me. The paratypes as follows: 1 male and 1 female, 

 Bangor, Me., March 24, 1922 (G. M. L. 12119 G5) ; 3 males and 4 

 females, Bangor, Me., March 23-27, 1923 (G. M. L. 12119 H4d) ; 

 2 males and 2 females, Bangor, Me., May 23-28, 1923 (G. M. L. 

 12119 H4g) ; 2 males, Greenfield, N. H., April 1-4, 1927 (G. M. L. 

 12119 N2) ; 2 females, Margaretville, N. Y., April 10-11, 1924 (G. M. 

 L. 12119 J5) ; 1 female, Putnam Valley, N. Y., April 6, 1927 (G. M. 

 L. 12119 N6) ; 1 male, Boxford, Mass., May 16, 1927 (G. M. L. 

 12119 N7) ; 2 males, Carmel, Me., February 3-13, 1923 (G. M. L. 

 12119 H4a) ; 2 males, Newport, R. I., April 17, 1924 (G. M. L. 

 12119 J6). Besides the type material, several hundred specimens, 

 reared from 8. cecropia from about the same localities as the above, 

 have been examined. As regards distribution, it is interesting to 

 note that there is material of this species at the United States Na- 

 tional Museum bred from Samia rubra Behr, from California, by 

 J. A. Kusche, 1919. 



Ty^e.— Male. Cat. No. 43049, U.S.N.M. 



5. ACHAETONEURA MELALOPHAE Allen 



Achaetoneura melalophae Allen, Trans. Amer. Ent. Soc, vol. 52, p. 195, 1926. 



Male. — Front at narrowest part one-fourth diameter of head ; face 

 and front yellowish pollinose, often blackish at vertex. No strong 

 bristles outside of frontal row; facial ridges bristly on lower half; 

 antennae black, third joint in male about five and in female about 

 four times the length of the second; bucca from one-fourth to one- 

 fifth the eye height. 



Thorax black, gray pollinose; scutellum often brownish at tip; 

 chaetotaxy as in frenchii. 



" Abdomen black or at most with an indistinct spot of red at sides 

 of second segment, densely overlaid with gray pollen in which ir- 

 regular black areas appear, when viewed from behind, in addition 

 to two spots on median dorsal line ; the rather coarse suberect bristly 

 hairs are surrounded at their insertions by conspicuous round black 

 2660—30 3 



