FAAilLV v.— GROrSE LOCUSTS. 



Ill 



the face more prominent than in the ^enus Tettix and Fara- 

 tettix; antennae 21 to 22 jointed ; lower anterior angle of 

 sides ot pronotum rounded and not bent inward as in Te^t/jt; 

 front border of the pronotum thrust forward and part- 

 ly concealing the head ; median carina straight, somewhat 

 curved anteriorly; lateral carina less prominent than in 

 Tettix, and not so strongly bent inward in advance of the 

 broader portion of the pronotum. 



Tettigidea lateralis Say [pennata) Morse. 



Head and sides of body blackish-brown ; 

 hind femora with a rather large ochraceous 

 spot outside about the middle; underside of 

 body dirt}' yellow ; top of pronotum light or 

 dark testaceous, sometimes the samecolor as 

 the sides of the bod\% with a testaceous bor- 

 der. In the male the face and lower anterior 

 portion of thq pronotum are yellow. Wings 

 and pronotum extending beyond the abdo- 

 men, wings somewhat longer than the pro- 

 notum. The insect is illustrated in Fig. 66. 

 Measurements. — Male, length of body, 10 mm.; prono- 

 tum, 11 mm.; posterior femora, 6 mm. Female, length of 

 body, 14 mm.; pronotum, 15 mm.; posterior femora, 

 7.5 mm. 



Tettigidea polymorpha Burm. 



This seems to be simply a form of lateralis, distinguished 

 from it by having shorter pronotum and wings. Other- 

 wise they are either the same or very closely allied. 



Both species are common in Minnesota, but especially 

 polymorpha (parvipennis Harr.). 



Fig. ee.—Tetti- 

 ftidea lateralis. — 

 Original. 



SUB-FAMILY TRYXALIN^. 



Prof. Jerome McNeill has quite recently published an ex- 

 cellent account of the insects forming this sub-family. Those 



