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SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 37 



The labium. — As do the maxillae, the labium (fig. 4 C) conforms 

 to the typical acridoid structure. The submentum (Smt) is large, with 

 elongated basal angles. The broad mentum (Mt) carries laterally 

 the three- jointed labial palpi (Pip), and apically the large paraglossae 

 (Pgl) and the very small glossae (Gl). 



The hypopharynx. — The hypopharynx (fig. 5 B, C) does not show 

 major differences from that of other grasshoppers. Its lateral and 



Fig. 4. — Maxillae and labium of Marellia rcmipes. 



A, left maxilla, posterior surface. B, right maxilla, posterior surface. C, 

 labium, posterior view. 



Ca, cardo; Ga, galea; Gl, glossa; Lc, lacinia; Mt, mentum; Pf, palpifer; Pgl, 

 paraglossa; Pip, palpus; Smt, submentum; St, stipes. 



posterior surfaces (fig. 5 C) are covered by rather large sclerotized 

 plates. 



III. THE THORAX 



As can be seen in figure i, the thorax of Marellia remipes is wide 

 and depressed, narrowing upward from a broad sternum to its tergal 

 region. Seen from above, the thorax is narrowest at the anterior edge 

 of the prothoracic region, broadening gradually from there backward 

 to the line passing through the anterior edges of the cavities of the 

 hind coxae. 



The prothorax. — The general shape of the prothorax is illustrated 

 in figures i and 6. It is relatively short, considering the size of the 



