122 INSKCUTOR INSCITI^ MENSTRUUS 



Actiopsis autumnalis, new species. 



Length of body, 3.5 to 4.5 mm. ; of wing, 3 to 3.5 mm. 

 Twelve females on flowers of Aster sp. as follows : One, Great 

 Falls, Maryland, October 30; the rest Grove Hill, Maryland, 

 two on October 30, one on October 31, six on November 2, and 

 two on November 7, 1916 (Townsend). 



Dark brown, silvery to pale yellowish pollinose. Head yel- 

 lowish in ground color, the parafrontals and occiput darker. 

 Pollen of face, cheeks, orbits, and front silvery with a slight 

 golden sheen. Frontalia brownish-rufous. Palpi and antennae 

 deep fulvpus. Third antennal joint except base brown, arista 

 brown. Thorax and scutellum brassy-gray pollinose. Scutel- 

 lum fulvous on apex. Abdomen dark chestnut brown, thinly 

 silvery, the narrow bases of last three segments more thickly 

 pollinose. Legs brownish to brownish-fulvous, tarsi dark. 

 Wings nearly clear. Tegulse pale yellowish-white. 



Holotype, Cat. No. 30795, U. S'. Nat. Mus. Paratypes in- 

 clude TD5067, 5074-5. 



Cordyligaster petiolatus (Wied.) Macq., 1843 (fig. of 

 female). 



Dcxia petiolata Wied., 1830. 



Cordyligaster petiolatus Rdi., 1848; Walker, 1849, List; Schiner, 



1868. 

 Megistogaster fuscipennis Macq., 1851 (fig. of male). 

 Cordyligaster tipuliformis Walker, 1858 (probably immature or 



bleached specimen). 

 Cordyligaster petiolata Wulp. 1885 ; B. B., 1889-93 ; Brauer, 1897. 

 Eucordylidexia ategulata Towns., 1915. 



Repeated comparisons of specimens with the figures and 

 descriptions has convinced me of the correctness of the above 

 synonymy. Strange as it may seem, it is evident that Wiede- 

 mann, Rondani, Schiner, Wulp, and Brauer have overlooked 

 the aborted tegulse of this remarkable form. In his descrip- 

 tion of Megistogaster, Macquart mentions the very small tegu- 

 lae. Walker mentioned them in the description of his tipuli- 

 formis, a specimen which I consider could not have been in 

 mature or normal color. It is likely that Megist. analis Macq., 



