. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PARSONS : THORAX OF GELASTOCORIS 315 A ventral view of tlie niesothorax (Fig. 13) shows an extensive episternnm {ESII) and a somewhat smaller epimeron (EPII) separated by a long and distinct pleural suture (PSII). Both these sclerites have supracoxal lohes overlapping the eoxal bases as in the prothorax; in addition, a posterior lohe of the epimeron (ELII), which is continuous Avith the epimeral supracoxal lobe, overlaps part of the metathoracic episternnm, concealing the lateral boundary between the mesothoracic and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. PARSONS : THORAX OF GELASTOCORIS 315 A ventral view of tlie niesothorax (Fig. 13) shows an extensive episternnm {ESII) and a somewhat smaller epimeron (EPII) separated by a long and distinct pleural suture (PSII). Both these sclerites have supracoxal lohes overlapping the eoxal bases as in the prothorax; in addition, a posterior lohe of the epimeron (ELII), which is continuous Avith the epimeral supracoxal lobe, overlaps part of the metathoracic episternnm, concealing the lateral boundary between the mesothoracic and metathoracic pleura (Fig. 14). At the posterolateral corner of this posterior epimeral lobe is a conspicuous knob (Figs. 7 and 14, K) ("Hocker" of Larsen, 1945a and b) which fits into a depression on the anterior margin of the forewing and thus holds the resting xn XRE. Esm xm ss AM Figuie I'd. A'cntral view of the pterothorax. The legs, except for the right coxae, have been removed and the forewings have been cut off near their bases. wing firmly in i^lace. Dorsal and considerably anterior to this knob, the epimeron meets the mesopostnotum forming the postalar bridge (Fig. 11). Ventral to the base of the wing, both pleural sclerites are somewhat evaginated to form a sort of shelf; in the epimeron, this shelf continues into the posterior epimeral lobe (Fig. 11). Dorsal to this evaginated portion, at the point where the epimeron joins the episternnm, is a short pleural wing process (''wing fulcrum" of Taylor, 1918) (Figs. 8 and 11, WPII). This process lies ventral and lateral to the anterior notal wing process. The dorsal margin of the e])imeron is somewhat thickened and curved. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. :
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