PSYCHE. 



NOTES ON NEW ENGLAND ACRIDIDAE.— III. OEDIPODINAE.— VII. 



BY ALBERT P. MORSE, WELLESLEY, MASS. 



19. PSINIDIA Stal. 



Psinidia St:\l 1S73. Recensio 

 Orthopterorum, i, 117, 133. 



2S. Psinidia fenestralis Seiv. 

 Fig. 3S. 



Oedipoda fenestraiis. .Serville, — 

 Hist. nat. d. Ins., Orth., 726, (1S39), 

 Thomas, i iS. 



Locusta eucerata. Harris, 180. 



Oedipoda eucerata. Scudder, 472 ; 

 Smitli, — Conn., 373; Thomas 119. 



Psinidia fenestralis. Saussure, 

 161 ; Morse, 105 ; Beutenmiiller, 303 



Psinidia fenistralis. Fernald, 44 



Antenna: $ ., 10. 7-13. 3; 9, 10-13 

 H. fem. : $, cj-ii.'j; 9, 11-13.5 

 Teg.: i, 15.5-20; 9, I7-5--4 

 Body: c? , 15-17.5; ?, 19-25- Tota 

 length : (? , 20-24 ; ^ ' 23-30 mm. 



Though presenting some resemblance 

 to the species of Spharagemon and 

 Scirtetica and frequently found in the 

 same locality this locust is readily dis- 

 tinguished from them by the strongly 

 constricted pronotum, the form of the 

 antennae, and the venation of the teg- 

 mina, as noted in the Key. 



The antennae are unlike those of any 

 other species of the subfamily in the 

 depressed, prismatic form of the joints, 

 appearing almost ensiform next the base. 



Another peculiarity noticeable is that 

 on the distal third of the tegmina the 

 maculation is restricted to the costal 

 half. 



In general coloration this species 

 varies widely, according to environ- 

 ment, from pale dust-color to bright 

 reddish brown or even black. The 

 most interesting feature connected with 

 its coloration, however, is the variation 

 in the color of the wings. As noted 

 before, these may vary in specimens 

 from the same spot from dull white 

 through yellow and orange to vermilion 

 red. This is no doubt due in part to 

 age, but seems also to depend upon 

 other conditions, partly, it is probable, 

 upon humiditv as suggested by Prof. 

 Bruner, but principally, I believe, upon 

 temperature. 



Nearly one-half of my specimens 

 taken on the sea-beach at Stamford, in 

 the warmest corner of Connecticut, are 

 red-winged. At West Chop, M. V., 

 and Provincetown, Mass., in the same 

 situation, all are yellow-winged. At 

 Wellesley, Sherborn, and Dedham, 

 Mass., several miles inland, red-winged 

 e.xamples are comparatively scarce. 

 At No. Conway, N. H., all are yellow- 

 winged. Mr. Henshaw informs me that 

 many of his specimens from Nantucket 



