OF WASHINGTON, VOLUME XII, 1910, 123 



and in the dense thickets of grass and herbage growing close 

 to the water on Plummer's Island above Washington. On the 

 night of September 10, 1909, Mr. A. N. Caudell and I heard 

 and captured a number of males of this species in a small 

 meadow by the roadside near his house. These insects were 

 concealed in an almost impenetrable tangle of marsh grasses 

 and weeds. 



It was very difficult to locate these singers by their notes, 

 for they seemed to penetrate the vegetation of the entire mea- 

 dow. These notes were intermittent, and continued for short 

 intervals, followed by an occasional pause tsip-tsip-tsip 

 pause tsip-tsip-tsip-tsip , etc. They were much softer, more 

 lisping in character, and much more leisurely produced than 

 the notes of Conocephalus brutieri, which I had heard in north 

 Georgia, and quite lacked that attendant, droning buzz so 

 characteristic of those species whose notes are a prolonged 

 z-z-z-z-z-z-z. This softer, more lisping character of the 

 notes reminded me of the notes of Atlauiicus pachv merits 

 Burmeister, which I had likened it to in my journal, under 

 date of September 10. My own records of the song of C. 

 exiliscanoriuis, agree very closely with the description of the 

 stridulations of this species by Davis, who notes particularly 

 their weak character and slow delivery. He says: 



The sound produced when stridulating is very faint, not louder than 

 that made by Gryllus abbreviates, and I was surprised to hear such a 

 faint song come from so large an insect. I have, in consequence of this 

 faint song, named it the "slightly musical" Conocephalus. 



This species of Conocephalus is not particularly shy, and 

 when approached usually tries to escape rather by dropping 

 into the grass and herbage than by flying away. 



Conocephalus palustris (Blatchley) (PI. V, fig. 3), occurs in 

 the grass and herbage near the water on Plummer's Island, 

 Maryland, and in other similar situations. Its note is a con- 

 tinuous z-z-z-z-z-z-z-z-z-z, indistinguishable from that of C. 

 triops Linnaeus. Its note is not loud and cannot be heard at 

 any great distance. This insect seems to be a night singer. 



Conocephalus friops Linnaeus is an exceedingly common 

 form around Washington, D. C., and also at Thompson's 

 Mills, north Georgia. It is probably the most common species 

 of Coiioecphalus in the north Georgia region. In September 

 I heard and captured a number of these locusts on the steep, 

 grassy hillsides just at the foot of the mountains in Towns 

 County, Georgia. This Conocephalns stridulates by day as 



