270 



PSYCHE. 



[October 189S. 



Acrydium ricbiginosum. Smith. Orth. 

 Ct., 370. 



Schistocerca nibiginosa. JNIorse, List, 

 105. 



Measurements from 1 04 (T , 43 9 '• — 

 Antenna : $, 13-14. 5 ; 9, 14-16. H. 

 fern.: <? , 16-19; '*' > 20.5-24: Teg.: 

 (?, 25-30; $,32-41. Body: c?-28- 

 ZZ\ ?' 39-54- Total: <?, 34-39; 5- 

 44-53 mm. 



One male from Connecticut has the 

 dorsal margin of the tegmina pale in 

 color but not of the bright yellow of 

 ahUacea. This species is much more 

 uniform in color than alutacea, rarely or 

 never showing any olivaceous, though 

 males taken late in the season (Sept. 

 24-Oct. 30) at Wellesley have much of 

 the rusty color replaced by gray. The 

 tegmina are often almost immaculate. 



It is more widely distributed in New 

 England than alutacea and differs from 

 it in preferring drier stations ; I have 

 found it most frequently in bushy pas- 

 tures and wild land on sandy soil and 

 along railway embankments, but other- 

 wise its habits appear similar. My 

 specimens were taken at various dates 

 from Aug. 5 to Oct. 30 at Provincetown, 

 Dedham (C. J. Maynard), and Welles- 

 ley, Mass. ; Kingston and Wickford, 

 R. I. ; Thompson, Deep River, New 

 Haven, North Haven, Stamford, and 

 Greenwich, Ct. Among these is an im- 

 mature female from Provincetown on 

 Sept. 5. 



2,2. Schistocerca alutacea Harris. 

 Fig. 32- 



Acrydium alutaceuni. Harris, Report 

 on Ins. Mass. inj. to veg., p. 139 

 (1841), — Treatise, 3rd ed., 173 ; 



Acrydium alutaceutii. Smith, Orth. 



Ct.. 373- 



Acridiiim alutaceiiin. Scudder. Ma- 

 terials, 466 ; Thomas, Syn. Acrid., 171 ; 

 Fernald. Orth. N. E., 31 ; Comstock, 

 Introd., 106 ; Beutenmiiller, Orth. N. Y., 



.304- 



Schistocerca alutacea. 



Morse, List, 



105. 



Measurements from 113 c? . 84 9 : — 

 Antenna: $, 15-17; ?■ i4-5-i7-S- 

 H. fern.: $, 17. 5-19. 5; 9, 22.5-27. 

 Teg.; $, 24-30; 9,36-42. Teg. pass 

 H. fern.: <J, 2-s; 9. 5-8- Body: <? , 

 28-32 ; 9 , 42-5°- Total : i , 33-39 : 

 9 , 48-54 mm. 



The ground-color of this species 

 varies remarkably in fresh specimens, 

 ranging from olive-green through yellow- 

 ish to deep reddish brown ; the pro- 

 notum and tegmina while sometimes un- 

 spotted are usually and in some cases 

 heavily marked with dusky blotches. 



This species is easily distinguished 

 from riibiginosa, the other common mem- 

 ber of the genus, by the bright yellow 

 mid-dorsal line, but there are also 

 structural differences very noticeable 

 on comparison : the head and prozona 

 are narrower and the vertex and facial 

 costa narrower and more prominent in 

 alutacea than in rubiginnsa (see figs.) ; 

 rubiginosa also has stouter fore femora. 



This species is common, even abun- 

 dant locally, in southern New England. 

 I have taken it at West Chop. Martha's 



