ART. 10 walker's north AMERICAN TACHINIDAE ALDEICH 7 



and one of Townsend's names will apply to the species with yellow 

 palpi. With only a single pair from Europe I am in doubt. We have 

 42 specimens of Lydina from North America, and they show remark- 

 able variations in antennal form and in the degree of hypertrophy of 

 the front tarsi in the females. It would not be feasible to attempt a 

 further analysis here. 



Tachina masuria Walker, List, p. 753. Coquillett (p. 72') 

 identified this as the species that he had previously described ~^ as 

 Clytiomyia exilis, making it the type of a new genus, Eutrixa. 

 Austen -^ published the following note on Walker's type : " Is an 

 Acemyla^ Rob.-Desv., apparently distinct from A. dentata Coq. and 

 A. tibialis Coq." As I did not see the type, I can add nothing to this. 

 Coquillett's species is easily disposed of by reviving his exilis, which 

 is not a sjaionym; for some years it has been correctly known as 

 Eutnxa exilis Coquillett. 



Tachina corythus Walker, List, p. 797. Coquillett (p. 73) 

 placed it as a sj^nonym of Xanthoiiielana atrifennis Say. The de- 

 scriptions agree very well, and no one has proposed a different 

 disposition of corythus. I did not see the type. 



Tachina aelops Walker, List, p. 796. Coquillett (p. 73) placed 

 this in the genus Beskia Brauer and Bergenstamm, which was 

 erected for a new species named cornuta^ from Brazil. Coquillett 

 placed cornuta as a synonym of aelops, and I '^'^ agreed with this 

 on examining the type of cornuta, but without seeing the tj^pe of 

 aelops. Austen -^ referred Walker's type to Beskia. Townsend -* 

 still thinks the two species distinct; this, however, does not inter- 

 fere with the correctness of the name used by Coquillett, Beskia 

 aelops Walker, as he refers the species to that genus. I did not see 

 Walker's type. 



Tachina insolita Walker, Insecta Saundersiana, p. 277. Co- 

 quillett (p. 85) placed this in the genus Melanophrys, along with 

 the type species of the genus, flampennis Williston. Later ^^ he 

 placed flavipennis as a synonym of insolita. The specimen now 

 bearing his label as insolita is correctly named, but his specimen 

 now bearing the name flavipennis is also insolita. He attempted 

 to separate the two species by the abdominal bristles, which are 

 somewhat variable and do not lend themselves to the purpose. In 

 insolita the third antennal joint is hardly longer than the second; 

 in -flavipennis it is fully twice as long in the female and even longer 

 in the male. The male of insolita has a striking, thick median 



'OJourn. New York Eiit. Soc, vol. 3, p. 53, 1895. 

 "Ann. Mag. Hist., ser. 7, vol. 19, p. 360, 1907. 



22 Ann. Eut. Soc. Amer., vol. 18, p. 120, 1925. 



23 Ann. Mag. Nat. Hist., ser. 7, vol. 3 9, p. 345, 1907. 

 " Ent. News, vol. 39, p. 150, 1928. 



^sproc. U. S. Nat. Mils., vol. 37, p. 567, 1910. 



