Smithsonian miscellaneous collections . (PB) is somewhat like a Cupids bow in shape on its dorsalaspect, dorsally minutely tuberculate, and with long, fine, wavy hairsall over. Each of the propleura (fig. 19) consists of two approximatelyequal-sized sclerites, the episternum and the epimeron, separated by thepleural suture (PLSi) which is almost perpendicular to the long axisof the body. Along the pleural suture a low ridge or lateral apodemeis produced internally. The episternum (ESi) is a transverse piece,narrow in the middle, with its dorsoanterior angle fused with thesternum, and its poste
Smithsonian miscellaneous collections . (PB) is somewhat like a Cupids bow in shape on its dorsalaspect, dorsally minutely tuberculate, and with long, fine, wavy hairsall over. Each of the propleura (fig. 19) consists of two approximatelyequal-sized sclerites, the episternum and the epimeron, separated by thepleural suture (PLSi) which is almost perpendicular to the long axisof the body. Along the pleural suture a low ridge or lateral apodemeis produced internally. The episternum (ESi) is a transverse piece,narrow in the middle, with its dorsoanterior angle fused with thesternum, and its posterior portion slightly bulging. It is minutelytuberculate all over, with the bulging area having larger tuberculesand long wavy hairs. The epimeron (EMJ is a rectangular piece,slightly higher than wide, tuberculate only on its ventroposterior por-tions, dorsally produced into a narrow strip along the posterior border NO. 6 MORPHOLOGY OF THE DRAGONFLY—CHAO 15 of the pronotum to approach closely the lateral end of the posteriorlobe. CEP. LATERAL VIEW POSTERIOR VIEW Figs. 17-20.—Prothorax and neck. The prosternum (fig. 18) consists of an anterior, large, elongate,rectangular piece and a posterior pair of small sclerites, the lattercollectively termed the postfurcasternum (PFST) (Crampton, 1926).The rectangular piece is divided into two portions, an anterior bast- l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 122 sternum (BS) and the posterior furcasternum (FS), by an anteriorly-arched sternacostal suture (SCS) which ends at the large fureal pits(FP), or apophyseal pits (Ferris, 1940). Along the sternacostalsuture a ridge is produced internally. The basisternum is fused on its anterior angles with the is minutely tuberculate, with a broad, shallow, submarginal circum-scribing depression; the posterior course of the depression beingweakly sclerotized and unpigmented. The area between the posteriordepression and the sternacostal suture is raised, with long hairs along
Size: 1409px × 1774px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookidsmiths, booksubjectscience
