REHN AND HEBARD 



385 



1872. Co7iocephalus attenuatus Scudder, Final Rept. U. S. Geol. Surv. 

 Nebr., p. 249. [Banks of Platte River, Nebraska.] 



Comparison of series of New England and Nebraskan material 

 and study of the original descriptions of ensiger and attenuatus 

 show that the latter name is an absolute synonym of the former. 

 All of the references for attenuatus in the literature belong under 

 the present species. 



The peculiar markings of the vertex in this distinctive species 

 are found in the large series before us to be extremely constant, 

 varying but little in intensity. The stridulating field of the male 

 tegmen is of similar proportions to that of N. 

 exiliscanorus but relatively decidedly smaller, in 

 texture normal; the stridulating vein is very long 

 and rather weakly swollen, with accompanying veins 

 weakly defined. The length of the ovipositor in 

 material from the Atlantic coast ranges from 27.3 

 to 33.3 mm., in that from Nebraska from 29.3 to 

 37.1 mm. 



The ventral margins of the femora are usually un- 

 armed; the ventro-cephalic margins of the cephalic 

 and median femora are very rarely found to bear 

 town, Rhode single spines, while of the ventral margins of the 

 Island. Strid- caudal femora the internal is more frequently found 

 "^^,^^"f fi^ld^f to bear a few small spines. 



The green color form is usually strongty pre- 

 dominant, only occasional brown individuals })cing 

 encountered. 



At night the incessant song of this species was everywhere 

 heard at Saunderstown, Rhode Island, excepting in the marsh 

 areas.. It is well described by Allard as, "tzip-tzip-tzip-tzip-tzip, 

 rapidl}' repeated for indefinite periods." The note is not loud, 

 in volume more similar to that of N . retusus than to that of A''. 

 exiliscanorus. 



The present species is known from Norway, Maine, southward 

 to the vicinity of Philadelphia, Pennsylvania, while in the south- 

 eastern United States the species is known from the Appalachians 

 in North Carolina and Tennessee. Westward its distribution 

 extends across southern Ontario as far northwest as the Red 



Fig. 5 A— 



Neoconocepha- 

 lus ensiger 

 (Harris). 

 Saunders- 



niale tegmen. 

 iXZh) 



TRANS. AM. ENT. SOC, XL. 



