PROC. ENT. SOC. WASH., VOL. 24, NO. 1, JAN., 1922 29 



16. Prothorax in ventral aspect; M.fissilis Sa;. . 



17. Ventral view of mesothorax, metathorax and abdomen; M.fissilis Say. 



18. Latero-ventral view of pleurites of mesothorax; M. Jlssilis Say. 



PLATE 6. 



19. Latero-ventral view of left pleurites of metathorax; M. communis Gyll. 



(partially diagrammatic). 



20. Dorsal view of left epimeron of metathorax (showing parts nor visible in 



fig. 19), and portion of notum of metathorax; M. communis Gyll. 



21. Wing of Melanotus sp.; from balsam slide mount. 



22. Dorsal view of abdomen with elytra and wings removed; M. communis 



Gyll. (fimbriation of last segment omitted). 



23. Dorsal view of protusible abdominal segments of male M. communis Gyll. 



with aedeagus lying along the plane of the body axis; (fimbriation of 

 7th and 8th tergites omitted). 



24. Lateral view of protrusible abdominal segments and aedeagus of male 



M. communis Gyll., with aedeagus directed forward over the tergum, 

 the position assumed when fully extruded. 



25. Ventral view of protrusible abdominal segments of male M. communis 



Gyll. In this figure only the bottom of the basal piece is visible, the 

 aedeagus being held at right angles to the body axis in this instance. 



26. Dorsal view of protrusible abdominal segments of female M. communis 



Gyll., with ovipositor fully extruded. 



27. Apex of ovipositor; Melanotus sp.; drawn from balsam slide mount. 



THE SPECIFIC NAMES OF TWO OTIORHYNCHID WEEVILS OF 



FLORIDA. 



BY E. A. SCHWARZ AND H. S. BARBER, U. S. Bureau oj Entomology. 



Incorrect application of the names for our two species of 

 Pachnaeus recently became apparent and the correction should 

 be noted before the changes appear in forthcoming biological 

 notes. 



One species is abundant in tropical Florida from near Miami 

 to Key West, and the other, common from central Florida 

 (Tampa, Crescent City, Lake Poinsett, etc.) to Alabama and 

 North Carolina, being recorded also from New Jersey. Simp- 

 son, in his very readable popular account of the natural history 

 of southern Florida, 1 discusses the dual character of the fauna 

 and flora, and it appears to us that the two species here con- 

 sidered offer a striking parallel to the cases he cites (pp. 144-5); 

 'that our northern form of Pachnaeus was perhaps part of the 

 pre- or- interglacial fauna of north Florida long before the 

 drift- or tempest-borne migrants from the West Indies (to which 

 fauna the second species belongs) began to find lodgment on 

 the newly forming reefs which now constitute the most southerly 



"In Lower Florida Wilds" by C. T. Simpson, 1920, G. P. Putnam's Sons. 



