HANCOCK 73 



At tlie edi^e of a pond overgrown with swamp grass the author found Tettix granitla- 

 tus, Tcttix onintus and T. o. triangularis. In another locality at the muddy border of a 

 small lake Teltix giblfosics ?ind Tetiix granulatus vjitre observed in considerable numbers 

 along with half-grown pupa. In the woods where a little temporary rivulet had drained 

 the rich soil, leaving the margins muddy, were Tettigidca p . pcnnata, Tcttix graiiulatus 

 and Tettix gibbosus. The Tettigids seemed rather scattered in their distribution locally, 

 and the discovery of these insects at this time in the spring is evidence of their hibernation 

 through the winter. Only two other species of locusts were met with belonging to larger 

 orthoptera. These were in the pupa 'stage, living amon^ the dried leaves in the woods. — 

 Glen Ellyn, 111., .April 23, 1899. 



Blatchley mentions that he has met with this species only in winter from beneath 

 logs in Vigo County. Indiana. The same observer found it very common in the depths of a 

 tamarack swamp in company with Tettigidea polymorpha. In writing of the habits of this 

 species, Morse says it prefers sedi;y meadow-lands and swales on sandy soil, occasionally 

 flooded by rains or freshets, and perpetually moist. Most of his specimens were taken 

 on a boggy swamp which had been filled in with sand and on which water stood most of the 

 time. Baker found the species hibernating under stones at Ft. Collins, Col., in March. 



TETTIX LUGGER 1, H.ANC. 



Plate IV., Figs. 6-6a. 



Vertex viewed from above slightly advanced beyond the 

 anterior border of the eyes; anterior border convex; median 

 carina distinct, viewed in profile low nearly horizontal, ele- 

 vated but little above the eyes; lateral margins of vertex very 

 little sinuate. Frontal costa viewed in profile distinctlyadvanced 

 beyond the eyes, not at all sinuate, scarcely convex between 

 the antenns; frontal costa with the vertex together forming 

 an obtuse conoid profile, apex not prominent. Pronotum 

 anteriorly truncate, posteriorly extenuate, passing beyond the 

 apex of posterior femora; dorsum between the shoulders tecti- 

 form; median carina of pronotum percurrent and distinct. 

 Wings extended beyond the apex of pronotal process. 



Length body 5, 15 mm.; pronot., 14.5 mm.; post, fern., 

 6 mm. 



Locality, Minnesota (Lugger); Illinois (Bolter). 



A slender form allied to T. granulatus, but differing prin- 

 cipally in the character of the vertex and frontal costa. The 

 head in this species is not unlike that of Tettix turki of 

 Europe. 



In a considerable series of specimens of Tcttix graitii/atiis 

 from Minnesota, the vertex presents variable forms interme- 

 diate between granulatus and liiggcri. The evolution of the 

 angulate vertex was excellently shown to have arisen from a 



