448 Mr. CuRTis's Descriptions of 



Melolontha dubia, Oliv. Entom. vol. i. gen. 5. p. 32. pi. 3. f. 20. 



Taken at Monte Video. I have also received it from Rio Janeiro and New York. 



*'J6. Cyclocephala fallens, Fah. 

 Not uncommon about Rio Janeiro. 



Section Phyllophagi. 



N. G. Tribostethes, Curt. 



Palpi iis Brachystemi similes, nisi quod maxillares longiores, labiales breves ; illorum articulus 

 basalis minutus, 2dus 3tiusque obovato-truncati, hoc breviore, 4tus longus, gracilis, fusi- 

 formis, extus sulco longo exaratus. Antennje lO-articulatae, articulus basalis crassus 

 clavatus, 2dus parvus subglobosus, 3tius ellipticus, tres sequentes oblongi, 7mus cunei- 

 formis, reliqui clavam ellipticam capitis longitudine efTormantes (fig. b.). Clypeus in- 

 teger rotundatus, margine paulum elevato, sutura transversal! inconspicua. Thorax 

 parvus transversua : scutellum mediocre, cordatum. Elytra thorace latiora, elliptica. 

 Alae amplae. Pectus villosissimus, sterno baud producto ; pygidio nudo. Pedes lon- 

 giusculi, baud crassi ; tibiae anteriores angusta;, extus tridentatae, reliquae setosae suturis 

 ordinariis; tarsi graciles, articulis omnibus subclavatis; ungue simplici (fig. c). 



*77- Tribostethes castaneus. 



Pallid^ castaneus, capite thoraceque virescenti vel seneo tinctis (Tab. XLI. 



fig. 2.^)., 

 Brachygaster castaneus, Laporte, Cours complet d'Hist. Nat. 

 Length 8 lines, breadth 4. 



Shining castaneous with an ochreous cast : head thickly and coarsely punctured, with a 

 green reflection and a violet tint round the clypeus : thorax reflecting green, rather 

 thickly but irregularly punctured, the sides a little produced at the middle, with a fovea 

 close to the margin, a channel down the centre, the base sinuated : scutel with a fringe , 

 of ochreous hairs over the base : elytra obscurely punctured, with 2 double lines of 

 punctures on each, the space along the suture coarsely punctured : underside and thighs 

 clothed with long ochreous wool ; abdomen and pygidium pubescent ; teeth of anterior 

 tibiae black. 



A single female was taken at Valparaiso, and I obtained the male from Brazil. 



Although a short description of this insect has been published in the work 

 above alluded to, it is advisable to identify it more completely here, that I may 

 make a few remarks upon this and the two following species. They have all 



