NATURAL SCIENCES OP PHILADELPHIA. 375 



and the dorsal and terminal line of each abdominal segment is much nar- 

 rower, the penultimate joints not differing in color from the others, and the 

 last joint being whitish ; the ventral joints, instead of being darker, appear 

 paler at tip ; the setse are whitish, almost immaculate. The costa is clouded 

 with yellowish, not darker on the tip : and the veins and cross-veins on the 

 postcosta of the front wings, and on the whole of the hind wings, except the 

 tip, are yellowish hyaline. 



Length J 7 7 mill. ; 510 mill. Alar exp. J* 1821 mill. ; 9 1 



29 mill. Seta j> 2025 mill. ; 9 1424 mill. Ant. leg tf 10 mill. ; $ 

 (same size) 6 mill. Eight tf, three 9 



The tf subimago differs from the tf imago in the colors being paler and 

 obscurer ; the seta? are immaculate and pilose ; the wings are ciliated and 

 tinged with fuscous, or in very immature specimens opuque and tinged with 

 yellow, and the veins and cross-veins colored as in 9 



The 9 subimago differs from the 9 imago in the prothorax being generally 

 fasciate posteriorly with black ; the abdomen is generally widely vittate with 

 fuscous, the vitta on each joint inclosing a lateral pale spot as in the normal 

 rf ; the setse and wings are as in $ subimago. 



Length tf 610 mill. ; 9 610 mill. Alar exp. J* 1725 mill. ; 9 20 



30 mill. Seta tf 915 mill. ; 9 714 mill. Ant. leg J* 8} mill. ; 9 (same 

 size) 8 mill. Five <^\ five 9 Sa y states of the imago, that " the stemmata 

 are distant," which is true of 9, *>ut not of J* ; and that "the seta? are im- 

 maculate," which is not generally true of cT- Again he says, that "the abdo- 

 men at tip is more or less obviously ferruginous," which is true of the tf, but 

 not of the 2 5 and in some other respects his description disagrees. This 

 insect is referred by Say to the genus Bcetix, and so is Palingenia bilineata. 



Palingenia pulchella, n. sp. ^ Whitish. Eyes in the living insect pearly 

 whitish, changing to blackish even before death ; ocelli ferruginous, their 

 orbits often blackish ; seta fuscous at base, pale at tip ; all above behind the 

 ocelli ferrngino-piceous, except the meso- and meta-thoracic scutella, which are 

 whitish, and the base of the seventh abdominal joint, and all but the extreme 

 terminal edge of joints 1 6, which are whitish hyaline, with a large subter- 

 minal lateral fuscous dot upon each. Setse whitish with fuscous incisures, 

 alternately narrow and wide on the basal half. Beneath all whitish, except 

 the sternum, which is light ferruginous, especially in front. Anterior legs 

 pale yellowish, with a medial and terminal band on the femora, tips of the 

 tibia?, and the tarsal incisures and tips fuscous ; four hind legs whitish, the 

 markings the same but paler, and the medial femoral band sometimes obso- 

 lete. Wings hyaline, with a pale brown cloud on the tip of the costa ; the 

 veins fine, except on the costa, the cross- veins rather coarser, especially on the 

 costa ; all fuscous, except the basal two-thirds of the costal veins, which are 

 yellowish ; the oblique cross-vein at the base of the costa is very coarse. In 

 the hind wings the postcostal veins and cross-veins are hyaline. 



The 9 differs from the tf as follows : The vertex is whitish, varied with 

 luteous or ferruginous ; the thorax is whitish, varied with luteous, and the 

 sternum and pleura whitish. The abdomen and venter are egg-yellow, except 

 where the eggs have been partially extruded ; abdominal joints 1 6 marked 

 as in tf ; 7 9 sometimes slightly tinged with ferruginous above, sometimes 

 immaculate. The cloud on the costal tip is paler, and the veins and cross- 

 veins of the hind wings are mostly hyaline. 



Length $ 67 mill. ; 9 5 J 6-V mill. Alar exp. J 15-21 mill. ; 9 17 

 22 mill. Seta g 1721 mill. ; 9 1516 mill. Ant. leg J* 9} mill. ; 9 (same 

 size) 5h mill. Twelve $, eight 9 



The 'tf 9 subimago, from which I have bred the imago, have the body 

 colored as the imago, but paler and obscurer. The setse are obscure pale 

 greenish, less distinctly annulate, and scarcely pilose, except at base. The 

 wings are subopaque, clouded with fuscous ; the fuscous cross-veins bordered 



1862.] 



