308 LAMELLICOENIA. 



nigris ; variat elytris vel elytris et thorace immaculatis ; clypeo quam in G. lacida apice latiore et minus 

 sinuato, interdum obtuse truncato, cum fronte sparse punctato ; thorace subtilius punctato elytrisque 

 subtiliter sat sparsim praecipue lineatim punctulatis. <$ . Tarsi antiei ungue majore apice lato fisso ; 

 pygidium versus apicem convexum, sparse punctulatum, apice ciliatum ; antennae breves, clava parva. 

 2 • Pygidium longitudinaliter haud convexum, punctulatum. Elytra post medium callo ovato margineque 

 vicino angusfce lobato-producto. 

 Long. 16-19 millim. <$ 2 • 



Hab. Nicaragua, Chontales (Belt); Costa Eica (Van Patten), Cache (Rogers); 

 Panama, Bugaba, Volcan de Chiriqui 2000 to 3000 feet (Champion). 



Yar. G. monochroa : vertice nigro excepto, toto flavo- vel rufescenti-testacea ; csetera ut in G. amblyopsis. 



Hab. Guatemala, Zapote (Champion) ; Nicakagua ; Costa Rica. 



A large number of examples of both type-form and variety ; the latter requires a 

 distinct name on account of the peculiarity of its distribution, all the numerous 

 examples from Zapote belonging to it, whilst further south the spotted type-form 

 prevails mingled with very few individuals of C. monochroa. An example from 

 Chontales is shown on our Plate. 



26. Cyclocephala gravis. 



G. lucidai affinis ; minor, rufo-castanea, polita, vertice nigro elytrisque flavo-testaceis ; clypeo fere sicut in G. 

 lucida, sed apice magis sinuato, arcuato-punctato ; sutura frontali acute impressa, flexuosa ; thorace 

 conspicue punctato ; elytris sat dense punctulatis et seriebus punctulorum utrinque geminatis quatuor, 

 sutura rufescenti. $ . Pygidium valde convexum, punctulatum, disco posteriore lseviore ; tarsi antiei 

 ungue majore fisso; antennae cum clava breves. $ . Pygidium fere sicut in <$ convexum; elytra a <? 

 parum diversa, haud callosa, apud medium gradatim leviter dilatata ibique margine paullulum inerassato, 

 post dilatationem angustata. 



Long. 17-18 millim. <$ $ . 



Hab. Mexico, Cordova (Salle), Jalapa (Hoge) ; Guatemala, Coban (Champion) ; 

 Nicaragua, Chontales (Belt, Janson) ; Panama, Bugaba (Champion). — South America, 

 Venezuela. 



A large number of specimens offering scarcely any variation. I have adopted the 

 MS. name C. gravis which the species bears in the Salle collection. Venezuelan 

 examples were sent to me some years ago from Paris under the name C. concolor, 

 Burm. : this is a very different and much larger species belonging to the group in 

 which the clypeus is elongate, semiovate, and entire. 



27. Cyclocephala mafaffa. (Tab. xvm. fig. 6, .e .) 



Cyclocephala mafaffa, J3urm. Handb. der Ent. v. p. 69 \ 



Hab. Mexico \ Orizaba, Cordova, Etla (Salle), Jalapa (Hoge) ; Guatemala (Salle), 

 Zapote, Las Mercedes (Champion) ; Nicaragua, Chontales (Belt 3 Janson) ; Costa Eica 

 (Bogers). 



A Mexican specimen is figured* 



