290 [May. 
Many of the new species of Odontocheila obtained by me have been 
described by the Baron de Chaudoir, in the Bulletin d. 1. Soc. Imp. des 
Nat. de Moscou, 1860, but the following complete list will be useful in 
comparing the productions of the Amazons region in this genus with 
those of other parts of Tropical America. 
1. O. Oseryi, Lucas ; Pebas, Upper Amazons. 
2. O. ruhefacta, Bates ; E. Huallaga. 
3. O. femoralis, Chaudoir ; St. Paulo, Upper Amazons. 
4. O. ocreata, Eeiche ; R. Tapajos. 
5. O. erythropus, Chaud. ; Ega. 
6. O. rufipes, Dejean ; Para. 
7. O. postica, Chaudoir ; St. Paulo, Upper Amazons. 
8. O. Trilhyana, Thomson ; Upper Amazons, common. 
9. 0. distinguenda, Chaudoir ; Para. 
10. O. trochanterica, Bates ; Para. 
11. O. margineguttata, Dej. ; Ega. 
12. O. confusa, Dej. ; common throughout the Amazons region, 
13. O. rugatula, Bates ; Obydos, Lower Amazons. 
14. 0. eximia, Lucas {rhytiptera, Chaud.j ; St. Paulo, Upper Amazons. 
15. O. cyanella, Chaudoir ; Ega, rare. 
16. 0. amabilis, Chaudoir ; Ega, rare. 
17. O. Batesii, Chaudoir ; St. Paulo, Amazons. 
18. O. Gastelnaui, Lucas (=0. Batesii, local var.) ; Pebas, Upper 
Amazons. 
19. O. Lacordairei, Gory ; general throughout the Amazons region. 
20. 0. cTirysis, Eab, ; St, Paulo, Amazons (agreeing precisely with 
Surinam specimens). 
21. 0. egregia, Chaud.; Amazons, from Obydos westward; in cacao 
groves. 
PsEUDOXTCHEiLA TAiiSALis, n. sp. Suturate-ccerulea, elytris plaga 
magna atro-velutina, maculam parvam transversam pallide-ochraceam 
includenti ornatis ; {^) apice prolongatis, suturd in dentem latum 
recurvum productd ; tarsorum intermediorum et posticorum articulis hasali- 
hus diu>bus paulo incrassatis, subtus nudis, grosse punctatis. 
Long. 8 lin. ^ . 
Differs from the allied species in its rich dark indigo-blue colour, 
and the pale hue of the elytral spot. In the c? » also, the apex of the 
elytra at the suture is much prolonged, and forms a broadish tooth 
curved a little outwards. The underside is rich dark blue, and the 
legs are shining black. A remarkable feature is the perceptible thicken- 
