298 Annals Entomological Society of America  [Vol. XIV, 
ited to a short dorsal curve; accessory pieces present, distinct; marginals 
few, similar in distribution to segment VI; discal area hyaline. Sternum 
much reduced, funnel form; marginals separated into two lateral groups 
of a few sete each, usually two; conjunctiva smooth, hyaline. 
Segment VIII. Tergum composed of two lateral plates whose 
caudal expansions fuse across the mid-dorsal line and extend slightly 
ventrad; cephalad the tergites approximate slightly; discal area smooth, 
hyaline; marginals equal, regular, sparsely distributed. Sternum com- 
posed of two heavily chitinized, lanceolate plates, attaining three- 
quarters the length of the segment, similar to cilicrura; sete few dis- 
tributed on the apical area; conjunctiva smooth, hyaline. 
Segment IX. Suranal plate scoop-shaped; setz short and stout, 
wide apart, equal to the breadth of a club; setulae few: subanal plate 
spinulose, bell-shaped; sete limited to the apical region; setule 
numerous, equal, short and thornlike, distributed over the inner surface, 
the outer margin being bare; cerci glabrous, knoblike, short petiole; 
setze few, sparesly distributed, apicals short, one per club; sensory 
organs two, contiguous, situated at the apex, domelike. 
Chortophila candens Zetterstedt. 
Segments slightly longer than the intersegments, broader than 
long, more heavily chitinized along the cephalic than on the caudal 
margins; sclerites glabrous, except the subanal plate which is spinulose. 
Intersegments spinulose except the fourth which is smooth. - 
Segment VI. Tergum composed of two broad quadrangular lateral 
plates, dorsal and ventral borders indefinite; discal area lightly chitin- 
ized, blending imperceptibly with the lateral plates, widely separating 
the tergites for the most part; accessory pieces present; marginals 
diverse, numerous, closely distributed along the caudal margin of the 
segment; spiracles oblique, separated by the caudal margin of the 
segment, the posterior spiracles opening on the second intersegment. 
Sternum vasiform, heavily chitinized cephalic half, lightly chitinized 
caudal half; marginals approximate, bordering the caudal margin; 
conjunctiva spinulose. 
Segment VII. Tergum similar in character and structure to segment 
VI, except that the spiracles and accessory pieces are absent; marginals 
numerous, closely distributed, discal area thinly chitinized. Sternum 
lanceolate, the borders indeterminate; marginals bordering the caudal 
margin; conjunctiva spinulose, indistinctly striated. 
Segment VIII. Tergum composed of two quadrangular lateral 
plates, the caudal margin oblique, constricting the ventral borders to 
but one-half the length of the segment, cephalic margins strongly 
chitinized, approximating dorsad so as to enclose the discal area; discal 
area thinly chitinized, imperceptibly blending into the lateral plates; 
marginals equal, closely distributed along the caudal margin of the 
segment, a group of strong sete situated at the caudo-ventral angles of 
the tergum. Sternum composed of two short ovoid sternites on which 
are distributed numerous stout heavy spines; conjunctiva smooth. 
+ European specimen. 
