REHN AND HEBARD 29 



Acknowledgments. — We wish to tender our thanks to Dr. Sam- 

 uel Henshaw of the Museum of Comparative Zoology, Mr. A. N. 

 Caudell of the United States National Museum, Mr. W. T. Davis 

 of New Brighton, New York, and Prof. A. P. Morse of Wellesley, 

 Massachusetts, for their courtesy in placing at our disposal the 

 material of the genus in the collections under their charge or in 

 their possession. To Mr. Davis, especially, we are under great 

 obligation for not only material but numerous suggestions, as 

 well as copies of important correspondence relative to the identity 

 of certain species of the genus. Any call we have made on him 

 has been cheerfully answered to the fullest extent of his ability. 



Orchelimum agUe (DeGeer) (Figs. 6, 18, 35, 36 and 69.) 



1773. Locusia agilis DeGeer, Mem. Hist. Ins., iii, p. 457, pi. 40, fig. 3. [Penn- 

 sylvania.] 



1839. Orchelimum glaucum Serville, Hist. Nat. Ins., Orth., p. 524. [North 

 America.] 



1891. Orchelimum silvalicum McNeill, Fsyche, vi, p. 2Q. (February.) [Rock 

 Island, Illinois.] 



1891. Xiphidium {Orchelimum) nitidum Redtenbacher, Verb. k.-k. zool.- 

 botan. Gesellschaft Wien, xli, pp. 494, 503. (July.) [Georgia.] 



1891. Xiphidium {Orchelimum) spimdosum Redtenbacher, Ibid., pp. 495, 503. 

 (July.) [North Carohna.] 



1907. Orchelimum molossum Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 

 1907, p. 307, figs. 4 to 6. [Pablo Beach, Florida.] 



While previously of the opinion that agilis of DeGeer was the 

 same as Harris' vulgare,^^ we now feel that this view is erroneous 

 and that the name properly belongs to the present species. Ana- 

 lyzing DeGeer's description and comparing it with females of the 

 present species and imlgare, we find that in size {%. e., of Pennsyl- 

 vania material), in the relative length of the ovipositor, which 

 Stal in discussing DeGeer's type says is ''femoribus posticis plus 

 dimidio breviore," in the several spines on the caudal femora 

 and in the greenish costal edging of the tegmina the present species 

 is in agreement with the description, while in the same features 

 vulgare shows differences. The relative proportions of the head, 

 pronotum and caudal limbs in the original figure are also those 

 of the present species. 



The remainder of the above synonymy has been established 

 only after a careful study of the literature involved, typical mate- 



11 Proc. Acad. Nat. Sci. Phila., 1910, p. 640, (1911). 



TRANS. AM. ENT. SOC, XLI. 



