JAMES A. G. REHN AND MORGAN HEBARP 4" 219 



AN ASIATIC SPECIES OF THE DECTICID GENUS ATLANTICUS 

 (ORTHOPTERA; TETTIGONIIDAE) 



BY JAMES A. G. REHN AND MORGAN IIEBARD 



Recently, while looking over a collection of insects from China, 

 acquired by the American Museum of Natural History, we were 

 greatly surprised to see a female of what was presumably a species 

 of the genus Atlaniicus. This genus was previously known only 

 from the eastern and central United States and a small adjacent 

 portion of Canada, and on account of a recent study we had 

 made of the species'^ our acquaintance was of more than a super- 

 ficial character. Through tlie kindness of Dr. Frank E. Lutz 

 the specimen was placed in our hands for more detailed study, 

 and a critical comparison has been made to determine its true 

 relationship and generic position. The allied Old World genera 

 were examined, when available, or the diagnoses studied, and 

 the result of our investigation confirms our first impression, as 

 the species is a true Atlantiais, the first known from the Old 

 World, or for that matter from outside of the area mentioned 

 above. 



The species has certain features of distinction which give it a 

 unique position in the genus, such as the great elongation of the 

 distal joint of both pairs of palpi, and the tegmina, in the female 

 sex, extending briefly caudad of the caudal margin of the prono- 

 tuni. Whether these features are specializations, or whether they 

 are phylogenetic "signboards" indicating the possible ancestral 

 affinities of the genus, we arc not prepared to say at present. 

 We now are warranted, however, in pointing to this genus as 

 another member of the already long list of genera common to 

 the ])iota of eastern China, Japan, and to a certain extent of 

 Formosa, and that of the eastern United States. 



In a synoptical arrangement of the genus we would place the 

 species by itself, with the feature of great palpal length as diag- 

 nostic. The discovery of the male sex will be awaited with in- 

 terest. 



1 Trans. Amer. Entom. Soc, xlii, pp. 33 to 99, (1916) 



TRANS. AM. ENT. SOC, XLVI. 



