OKTHOPTEltA— LOCUSTIDAE— STEIROXYS BILINEATA. 905 



sharp, and slightly curved spine equal in length to the cerci, thus L, some- 

 what in the form of an L, being different from any species in this respect that 

 I am acquainted with; subgenital-plate triangularly but not very deeply 

 notched at the extremity, similar in form to that of St. trilineata, the lobes 

 carinated, obtusely pointed. Anterior tibia? with two spines in front; middle 

 tibiae with two rows in front, inner row with four, outer two spines; posterior 

 femora with a few minute denticulations along' the inferior margin. Spine 

 over the anterior coxa? broad at base, prominent. 



Color (after immersion in alcohol). — Purple and yellow. The face dull 

 yellow; pronotum purplish, margined on the sides and posterior extremity 

 with yellow, the purple deepest on the sides; abdomen purple, posterior 

 margin of each segment yellow, forming narrow bands across the abdomen ; 

 genital parts yellow. 



Dimensions. — Length, 1 inch; pronotum, 0.30 inch; posterior femora, 

 0.75 inch; elytra, 0.13 inch. 



Locality not given. Contained in the collection of 1873. 



In general appearance and size, this species is much like Anabrus 

 Stevensonii, which will probably have to be referred to this genus, but is 

 quite distinct. It is possible that on account of the abnormal character of 

 the cerci a new genus will have to be formed for its reception; but I am 

 doubtful whether variation in the cerci is sufficient "round for forming: new 

 genera. The stylets of the subgenital plate appear to have been broken 

 off in the only specimen I find in the collection. 



I have named the species in honor of Mr. Otto Hermann, of Vienna, 

 author of the valuable revision of this group of genera. 



STEIROXYS BILINEATA, sp. nov. 

 Plate XLV, Fig. 7. 

 Female. — Pronotum very slightly emarginate in front, squarely truncate 

 behind, without any distinguishable carina?.; the dorsal area slightly con- 

 stricted near the anterior margin, otherwise as in St. trilineata. Abdomen 

 proportionally longer and larger than in the latter species, also enlarged 

 in the middle, somewhat fusiform. Cerci short, slender. The posterior 

 abdominal segment with a small, sharp, triangular notch; the lobes in the 

 form of short teeth; the subanal [date with a small, blunt, triangular notch. 



