1920.] NATURAL SCIENCES OF PHILADELPHIA. 45 



The features which separate AetaeIJa from Leptomantis are given 

 below for the two genera. 



In Leptomantis the ventre -internal margin of the cephalic femora 

 shows the following formula, ilililililiiil. The cephalic tibiae 

 have the yentro-external margin armed with seven spines, the first 

 separated a considerable distance from the second, the second a 

 lesser distance from the third, the others separated by very brief 

 intervals. The first spine is elongate, the second much more so, 

 the third and fourth of about the same length, shorter than the first, 

 the fifth intermediate in length between the first and second, the 

 sixth shorter, intermediate in length between the fourth and fifth, 

 the seventh very elongate, it and the second the longest spines of 

 the series. The cephalic tibiae have the ventro-internal margin 

 armed with eleven to twelve spines. 



In Aetaella the ventro-internal margin of the cephalic femora 

 shows the following formula, ilililililililiiiil. The cephalic tibiae 

 have the ventro-external margin armed with six spines, the place- 

 ment similar to that in Leptomantis, except that the distal spines 

 are not so closely placed. The first spine is elongate, the second 

 more so, the third shorter than the first, the fourth as long as the 

 first, the fifth as long as the third, the sixth slightly longer than 

 the second. The cephalic tibiae have the ventro-internal margin 

 armed with thirteen to fifteen spines. 



We would note further that in Aetaella the tegmina do not widen 

 distad as much as in Leptomantis and, in consequence, the oblique 

 veins are not quite as widely separated. 



Aetaella bakeri^i new sijecies. (Plate I, flgiires 1.3 and 14.) 



In general appearance and form this species agrees closely wnth 

 Leptomantis albella (Burmeister). In addition to the striking differ- 

 ences of cephalic limb armament, the tegmina of this insect are 

 seen to be somewhat narrower in both sexes, with oblique veins 

 consequently slightly more approximate. 



The males of A . bakeri have the moderately large ocelli arranged 

 in a triangle slightly wider than high, while the males of L. albella 

 have the slightly larger ocelli arranged in a triangle slightly higher 

 than wide. In the females of both species the ocelli are greatly 

 reduced and arranged in a triangle wider than high. The tegmina 

 and wings are clear hyahne in A. bakeri, but show a slight milky 

 suffusion in L. albella. 



^^ We take pleasure in naming this interesting Mantid in honor of Mr. C. F. 

 Baker, through whose efforts a large portion of the material at present under 

 consideration has been assembled. 



