ORTHOPTERA— FORFICULARI^. 207 



as basally, and tlie liintler edge is straight. The forceps of the male (female 

 unknown) are very long, flattened, straight on the basal three-fiftlis (they 

 are given with a sliglit curve in the plate), and beyond gently sickle-shaped; 

 they taper very gently and with entire regularity to a bluntly rounded, 

 slightly angulated tip, excepting that the basal third or more has on the inner 

 margin a thinner, blade-like, straight flange, increasing the width by nearly 

 one-foiu-tli. Pygidium small, triangular, equilateral, with a blunt apical 

 angle. 



Length of body, excluding forceps, S 18™" ; breadth of abdomen, 3.5""°; 

 length of forceps, 6.3°""; breadth at base, 1.2""'; in middle, 0.75"". 



This species is slightly smaller than the preceding, but resembles it 

 closely, the forceps of the male having about the size of those of the female 

 of L. avia, though their flatness and mode of curvature, and especially of the 

 basal opposition, evidently indicate a male. 



Named for M. A. de Bormans, of Switzerland, the well known student of 

 Forficularige. 



Florissant. Two specimens. No. 11180, Princeton Collection, No. 

 1.603 (c?). 



3. Labiduromma mortale. 



PI. 16, Figs. 2, G ( 3 ), 20 ( 5 ). 



Head small, well rounded, a little produced anteriorly ; antennre 

 moderately slender, probably considerably less than half the length of the 

 body, the basal joint small, scarcely stouter than the third or fourth joint, 

 less than twice as long as broad, its apical half cylindrical and squarely 

 truncate ; the sixth joint considerably longer than the first, and scarcely 

 more than three times as long as broad ; palpi shorter than the diameter of 

 the head, the joints about twice as long as broad. Pronotum suborbicular, 

 a little smaller and no broader than the head, slightly broader than long. 

 Tegmina together considerably broader than the pronotum, perhaps almost 

 twice as broad, the apical edge nearly straight, rounded only next the outer 

 edge. Wings extending, when folded, as far beyond the tegmina as the 

 length of the latter. Legs not long nor stout, the middle pair situated nearer 

 the hind than the front pair, and of about the same length as the former, 

 the femora flattened, about twice the width of the tibiae Abdomen with 

 nearly parallel sides, a little broadest just behind the middle, the third and 



