510 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Fig. 1"). Dorsal vunv of the riglit valve of Kh'odcs disiicrfid ; compare with figs. 



13, 10, 14, and 23. 

 10. Dorsal view of the right valve of Eleodcn siilvipcnnis; compare with 



figs. 13, 15, 14, and 23. 

 17. Dorsal view of the right valve of Elcodcs acuta; compare with figs. 



14 and 23. 

 IS. Dorsal view of the right valve of Elcodcs anna la; note the nearly 



plane dorsal plate, refiexed internally, the flattened subconical ai)- 



pendage, and that the basal prominence is not well developed. 



19. I.,ateral view of the apicale of the edeagophore of Elcodcfi tcxana; note 



the moderately protruded edeagus between the ai»ex above and the 

 abducted clava beneath. 



20. Dorsal view of the right valve of the genital segment of Elcodcs iiiili- 



taris; note that the dorsal plate is concave with sides reflexed, sub- 

 marginal groove somewhat visible from above, appendage large and 

 flattened, the basal prominences evident. 



21. Dorsal view of the right valve of Elcodcs Iiicw; compare with flgs. 18, 



20, and 22. 



22. Dorsal view of the right valve of Elcodcs luciv, foniia iuflata ; compare 



Avith figs. 20, 21, 14, 17, and 23. 



23. Dorsal view of the right valve of Eleodc.s tei-ana; note the resemblance 



between figs. 22, and 21 as comi)ared with 13, 14, 15, 16, and 17. 



Plate 2. 



I"ig. 1. Dorsal view of the edeagophore of Elcodcs oniissa ; note the membra- 

 nous groove of the a])icale, the fully abducted clav;c and the extruded 

 edeagus. 



2. Sternite (male) of Elcodcs oiuissa, forma coiinniials. exhibiting varia- 



tion from the typical form ; note the sparsely setose interlobar mem- 

 brane; a, the produced internal basal angle of the triangular chitinous 

 plate of the sternite (see p. 18). 



3. Dorsal view of the genital segment of Elcodcs omissa, conunou form; 



compare with flgs. and !) of this plate and fig. 11. Plate I. 



4. Ventral view of the genital segment of Eleodes omissa, counnon form; 



note the surface contour, the direction of the appendages and the 

 broad fusiform genital fissure, the visible inferior pudendal mem- 

 brane. 



5. Sternite (male) of Elcodcs qiiadricollis, forma larsalis; compare with 



fig. 2. 



6. Dorsal view of the genilal segment of Elcodcs (iiiadricoUis, forma tar- 



salis: note the ditti'rences about aj)ices of the valves. 



7. Ventral view of llie genital segment of Elcodcs (jtiadricollis, fortna tar- 



salis; compare with figs. 4 and 10. 



8. Dorsal view of the edeagophore of Elcodcs quadricoUis ; compare with 



fig. 1. 

 0. Dorsal view of the genital segment of Elcodcs pygmaa; valves slightly 

 abducted; note the resemblance to fig. 3. 



10. ^'entral view of the genital segment of Elcodcs pygmwa ; valves moder- 



at(>ly abducted. 



11. Sternite (male) of Elcodcs marijhiaia; note the rather n)unded lobes 



and long setfe ; compare with fig. 2; Plate 3, fig. 2, and Plate 4, fig. 15. 



12. Dorsal view of the genital segment of Elcodcs marginata; note the 



nearly fully chitinized valves, the produced and everted apices, and 

 punctiform appendages. Compare with fig. 10. Plate 5. 



