1869.] 845 [Scudder. 



black, tibifB and tarsi luteous. Abdomen blackish at the sides and 

 along tlie posterior edges of the segments, and blackish fuscous in the 

 middle. Length of pronotum, .05 in.; of tegmina, .11 in.; of bind 

 femora, .12 in. One specimen (with forceps broken) was taken be- 

 tween Quito and Napo. 



40. Labia bilineata nov. sp. 



Piceous, with infrequent, short, decumbent, lustrous hairs; head 

 minutely punctured ; basal joints of antennae luteous ; palpi blackish 

 fuscous. Pronotum quadrate with a slight median furrow, not attain- 

 ing either margin ; the sides faintly bordered with dull luteous. Teg- 

 mina smooth, with a broad, pale luteous, humeral stripe reaching 

 neither the outer border nor the humerus nor apex ; exposed portion 

 of wings marked indistinctly with luteous on the inner edge at the tip 

 and near the outer border. Basal half of femora black, outer half 

 luteous ; tibiffi brownish fuscous, the apex paler ; tarsi dull fusco-lute- 

 ous, the basal joints paler ; abdomen blackish, densely punctured, the 

 hinder edges above fusco-rufous. Forceps straight, j^arallel, incurved 

 a little at the tip, under surface flat, the inner, inferior edge dentic- 

 ulate. Length of body including forceps, .34 in.; of tegmina, .05 in.; 

 of forceps, .06 in. One ?, the hind legs of which are lost and the 

 antenna3 broken, was taken between Quito and Napo. 



The following- jjaper was also presented : — 



A Study of the Gigantic Lobe-crested Grasshoppers of 

 South and Central America. By Samuel H. Scudder. 



An examination of the gigantic crested grasshoppers, mentioned in 

 the previous paper, has induced me to review the whole group. 

 Some errors have been detected in the work of preceding authors, 

 showing that they have given but comparatively slight attention to 

 these insects or to their representation by earlier writers ;i in conse- 

 quence, the synonymy of several Avell known species, as will be seen 

 beyond, has become greatly confused.^ 



1 For instance, Serville and Burmeister, in quoting Drury's description and fig- 

 ure of Grijllus dux, copy the mistake which Fabricius makes and repeats in all his 

 works, of referring to the first instead of the second vohime of the Illustrations of 

 Natural Ilistory. 



2 This seems the more remarkable, since an examination of many scores of 

 specimens lias shown that the variability of these huge Orthoptera is compara- 

 tively slight. I have compared over fifty specimens of a single species, Tropida- 

 cris crisyata, occurring in many diflerent localities from Surinam to Rio, and lind 

 the variation to be insignificant, — a fact which has given me greater confidence La 

 the opinions I had formed concerning the different species. 



