516 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Fii:. 20. Outline of side view of first two protai'sal joints ot E. qiUKlricollis, male; 

 tip of first .joint scarcely at all produced, with apico-uiarginal tufts. 



21. Outline of side view of tirst two protarsal joints of E. qundricolli.s, 



female; first joint distinctly produced at ai>ex beneath, with tuft of 

 modified spines, groove interrupted. 



22. Outline of side view of first two protarsal joints of E. longicollis, male; 



0, tuft of golden and rather soft pubescence, groove interrupted ; h, 

 second joint with pointed apico-marginal tufts, groove entire between 

 the same. 



23. Outline of side view of first two protarsal joints of E. Jongicollis, 



female; joints partly tii)ped to one side showing the entire plantar 

 groove. 



24. EleodiuKjiiiha holcau. — a, mentum, buccal fissures and produced buccal 



processes; the submentum is subobsolete, gular sutures distinct as in 

 Elcodes; b, outline of the ventral apical margin of the prothorax, arcu- 

 ate at middle, sinuate laterally. 



Plate 9. 



Fig. 1. Dorsal view of the edeagophore of Ili/dropJiiliis trifUH/iilaiis ; ti, and d, 

 the inner and outer lobes of Packard. 



2. Ventral view of tjie same. 



3. Dorsal view of the edeagophore of Bhips sunilis, showing the apicnle as 



formed by the uniting of the inner lobes of Packard. 



4. Ventral view of the same, showing the pallium (a) and edeagus id). 



5. Dorsal view of the edeagophore of EJcodes deiitipcs, 

 0. A'entral view of the same. 



7. A'entral'view of edeagophore Elcodes pUniipciuils. 



S. Dorsal view of the edeagoi)hore of Elcodes scabriciila. 



9. Ventral view of the same. 



10. Dorsal view of the genital segment of Hydropliilus triaitguhtris, female. 



11. ^'entral view of the edeagus ('/), basal chitinous i)ror-esses (c) and 



clavae abducted (d) of EI codes dcntipes. 



12. Dorsal view of the same. 



Plate 10. 



Note. — The bilateral asymmetrv is intentional to illustrate variations which 

 are constantl.y observed, when the pronota are viewed from above. 

 Fig. 1. Pronotum of Elcodes dclnUs, female. 



2. Pronotum of Elcodes omissa, male. 



3. I'rouotum of Elcodes omissa, female; variations a and h. 



4. Pronotum of Elcodes oiuissa, female; variations a and h. 



5. Pronotum of Elcodes pyguKra, female type. 



6. Pronotum of Elcodes pygijifni. female, variation. 



7. Pronotum of Elcodes ampin, male. 



8. Pronotum of Elcodes ampla, female; a. marginal curve as viewed 



obliquel.v from the side and from above; b, as viewed vertically from 

 above. 



9. Pronotum of Elcodes earbonaria, forma glabra, female. 



10. Pronotum of Elcodes earbonaria. forma li/pica. female. 



11. Pronotum of Elcodes earbonaria. var. soror. female. 



12. Pi'onotum of Eleodes obsolela, var. poreata. male. 



13. Pronotum of Elcodes obsolela. male; (( and b. showing variations in form. 



