208 Zoologica: N. Y. Zoological Society [III; 7 



adjacent to a medium, simple, elongate, suboval eusternal sclerite 

 {eu Plate VII, fig. 7) ; furcal pits {fur Plate VII, fig. 7) near 

 inside of legs. A well developed triangular poststernellum {pstl 

 Plate VII, fig. 7) present. Between pro- and mesothorax and 

 between meso- and metathorax a well developed intersternal 

 ring consisting of the poststernellar area {pstl. Plate VII, fig. 

 7) of the anterior and the presternellar areas {prst Plate VII, 

 fig. 7) of the posterior or two connected segments. Presternal 

 areas of meso- and methathorax, subtriangular, dorsally only 

 slightly separated from the spiracle-bearing preepipleural areas 

 of the segments. Hypopleural areas, above coxae, separated 

 by a distinct, short, perpendicular, chitinous line extending from 

 coxal hinge into an anterior subdivision, prehypopleurum (=epis- 

 ternum authoruvi), and a posterior one, posthypopleurum 

 (=epimeron authorum) . Legs inserted widely apart (leg Plate 

 VII, fig. 7) . Abdominal segments, from first to eighth, differing 

 anly slightly in size and shape, about as wide as thoracic segments, 

 somewhat shorter. Intersegmental membranes, indistinctly 

 developed dorsally and laterally, more distinctly ventrally. Each 

 abdominal segment with tergal areas fused, with poorly defined, 

 low epipleural area without lobe or other subdivisions, with 

 hypopleurum large, somewhat bulging, dorsally clearly limited 

 by a ventro-lateral suture, ventrally less sharply defined ; sternal 

 areas more or less fused. Ninth and tenth abdominal segments 

 mentioned above (p. 204). Spiracles annular (Plate VII, fig. 

 2, Plate VIII, fig. 13), not very conspicuous; mesothoracic 

 twice as large as abdominal ; metathoracic rudimentary ; both 

 meso- and metathoracic spiracles — as already mentioned — 

 located in preepipleurum ; abdominal spiracles all lateral and 

 of same size, located in the tergal regions medially or poster- 

 iorly near the rather indistinct dorsolateral suture. One pair 

 of small chitinous spots present dorsally on the thoracic seg- 

 ments; one pair dorsally and one pair ventrally on most of 

 the abdominal segments. Rounded, soft organs, shaped like 

 cloverheads attach internally to these spots; function unknown. 



