106 IXTROJ \ TO ENTOMOLOGY. 



A. YVin^s as long . domen. 



1). 1': i: turn sloping from t lie median curinu ; lateral curina- w.intiiu 



..men in males not swollen. i. AruihirM. 



utuin somewhat, flattened above; Literal margins an. 

 tremity of abdomen in the males much swollen. 4. MI.I.ANOI 



Wings of adult shorter than the abdomen or wanting. 

 H. l'r< sterna! spine prominent. 



Antennae tapering to the tip; and with the very distinct. 



2, DlCTYOPHi 



Antennae thread-like, of nearly the same thickness throughout ; 

 nn iistinct. 3. l'i / i i i i ix. 



I>1). Prostcrnal spine slightly developed. 5. UKACHVM 



i. Acridium. The most common representatives of this genus 

 in the Eastern U. S. are A. alutciccum and A. rubiginosum. In the 

 Southern States the most conspicuous species is ./. amcricanum. 



The Leather-colored Locust, Acndiuin alutdceum. 1 his locust 

 is dirty brownish yellow, with a paler stripe on the top of the head 

 and thorax; the wing-covers are semi-transparent, with irregular pale- 

 brownish spots, and with the sutural margins yellowish. Posterior 

 margin of each abdominal segment with a ring of black dots. The 

 win;. are longer than the abdomen. Length of body to end 



of abdomen, female 43-50 mm. (1.72 in.), male 31 nun. ( 1.24 in.). 



The Rusty Locust, Acridium rubigitwsum. The color of this 

 is light rust-red ; the wing-covers are opaque, rather paler on 

 the overlapping portion than elsewhere, and sometimes with dim 

 it usually Without them. The wing-covers arc- about as long 

 the abdomen. Length of female 35-40 mm. (.4-1.6 in. ); m. 

 much small 



The American Locust, Acridium amcricanum. This magnificent 



occurs in the Southern States, it can be easily recognized 



from Fig. 0, which represents its natural si/.e. This locust some- 



