176 Oil the Coleopterous Subfamily Dyna.stiiiffi. 



clypeo angusto, truncato, prothorace nitido, convexo, ubique 

 minute punctato, lato, lateribiis fortiter arcuatis, angulis posticis 

 rotundatis, basi medio breviter lobato ; scutello punctato ; elytris 

 sat crebre et tequaliter rugoso-piinctatis, lateribus postice densius ; 

 pedibus brevibus, tibiis anticis acute tridentatis, dente superiori 

 parvo, sed acutissirao, prope basin obsito : 



<S , clypei margine valde reilexo, tarsis anticis crassissimis, ungue 

 majori dilatato, minute fisso : 



2 , elytrorum marginibus post medium subito contractis. 



Long. 14*5-16 ; lat. mas. 8-5-9 mm. 



Hab. Guiana : Cayenne ; Brazil : Para. 



This species occupies a very isolated position by its 

 exceedingly short and broad form and the toothing of the 

 front tibia ; the latter is very short and has its uppermost 

 tooth near the base and small but very sharp. The elytra 

 may be entirely blood-red, except the margins, the red colour 

 may divide into an anterior and posterior patch upon each, 

 or the whole body may be black. 



The figures of Cyclocephala and allied forms upon Plate IV. 

 accompanying this paper serve only to indicate their outlines, 

 the red and yellow colours appearing black upon the photo- 

 graph. Upon Plate V. have been included figures of Golofa 

 antiqua and argentina, described by me in the last volume 

 of this Magazine (pp. 138, 139). 



EXPLANATION OF THE PLATES. 



Plate IV. 



Figs. 1, 3. Dipelicus borneensis, sp. n., cf . 



Fig. 2. , 2. _ 



Figs. 4, 6. Papuana semistnata, sp. n., d" • 



Fig. 5. , $ . 



Fig. 7. Pucaga pidchra, sp. n. 



Fig. 8. Cyclocephala brevissima, sp. n. 



Fig. 9. Jlo)-a, sp. u. 



Fig. 10. Ancognatha falsa, sp. n. 

 Fig. \\. Cyclocephala gregaria, sp. n. 



Fig. 12. latipennis, sp. n. 



Fig. 13. Dgscinctus dytiscoides, sp. n. 

 Fig. 14. Cyclocephala rtifovaria, sp. u. 



Plate V. 



Fiqs. 1, 3. Dichodonfns /tssicoryiis, sp. n., c?. 



Fig. 2. , sp. n., $ . 



Figs. 4, 5. Golnfa antiqua. Arrow, cJ . 

 Fig. 6. Pseud()ho»H»ii/.v crassiis, sp. n., cJ . 

 Fig. 7. Golofa argent ina, .\rrow, J , 

 Fig. 8. , $. 



