FAMILY V. -GROUSE LOCUSTS. 109 



This cinereous insect, marked with \'ellow- 

 ish and black, is b}' no means uncommon, 

 being found from April till October, yet 

 it is very difficult to secure. Sometimes 

 early in October, when the nights are already- 

 very cool, this insect may be found in large 

 numbers upon wooden side walks, which warm 

 FIG. e4>.—Tettix up caHicr in the morning than the groun'd. 



ornatus. Original. '^ .,,.., 



Here they squat, evidently enjoy mg the 

 warmth. A common form of it is shown in Fig. 64. 



Tettix triangulat is Scudder. 



Variet\^ brachyptera occurs in Minnesota, but has not 

 been seen by the writer. 



Tettix obscurus Hancock. 



Form slender; pronotum flattened on the dorsum, and 

 the lower margins of the lobes strongly distended laterally; 

 surface of dorsum finely rugose. Wings overreach apical 

 process. 



A number of this species were captured early in spring in 

 an open field near St. Anthony Park. 



Tettix Luggeri Hancock. 



Vertex slightly advanced in front of the CN-es, anterior 

 border convexed, mid-carina distinct; in profile face moder- 

 ately ampliate opposite the antennee, apex less prominent, 

 frontal costa nearly straight, not excavate, with the vertex 

 together rounded angulate. Pronotum tectiform, truncate 

 anteriorly, median carina percurrent and prominent, apical 

 process long, subulate, passing beyond the kree of hind fe- 

 mora. Wings reaching beyond the end of process. 



A slender form allied to T. granulatus, but differing 

 principally in the character of the vertex and the frontal 

 costa which is not at all excavate. Entire length, female, 15 

 mm, ; hind femora, 6 mm. ; pronotum, 14.5 mm. 

 GENUS Paratettix Bolivar (1887). 



A description of the genus has been given before. 



