36 . LAMELLICOENIA. 



punctulato ; elytris striis foveatis parum impressis, interstitiis et foveis striarum (pygidioque) ocellato-punc- 

 tulatis, carina humerali usque ad medium extensa calloque humerali obtuse carinato, apice 5-carinulatis. 

 c? . Tibiae anticae calcare apicali lato oblique truncato ; ventris segmentis medio paullulum contractis, apicali brevi. 

 5 . Tibiae antieae calcare angusto acuto ; ventris segmentis medio baud contractis, apicali longiore. 

 Long. 14 millim. S 2 • 



Eab. Mexico, Santecomapan {Salle) ; Panama, Volcan de Chiriqui (Champion). 



The Mexican examples indicate a local variety. They are smaller (10-11 millim.) 

 and have a much closer punctuation (the punctures stronger and ocellated) on the 

 thorax and ventral segments. D. parile is remarkable in this genus for the absence of 

 conspicuous sexual differences in the legs, sternum, and abdomen ; with the exception of 

 the spur of the anterior tibiae (very often worn away), there is no external apparent 

 disparity beyond the slight difference in the sutures of the ventral segments given in the 

 foregoing diagnosis. In colour and sculpture it resembles D.pretiosum, Harold, which, 

 besides being more elongate-oblong and larger (17 millim.), presents strongly denned 

 differential characters in the male — the ventral segments 1-4 being consolidated in the 

 middle and without sutures, and the mesosternum having an oblong tubercle in the 

 centre ; the legs, however, remaining without apparent difference. 



We figure a male example from the Volcan de Chiriqui. 



2. Deltochilum acropyge. (Tab. II. fig. 15, 3 .) 



Mgrum, subnitidum ; clypeo angustato, concavo, dentibus reflexis approximatis margineque extus valde angu- 

 lato, sat crebre punctato ; tborace utrinque obtuse angulato, crebre punctulato ; elytris distincte punctato- 

 striatis, interstitiis convexis, undique ocellato-punctulatis, carina bumerali brevi calloque humerali valde 

 unicarinato, apice carinis 5 valde elevatis tuberculoque prope suturam ; antennis runs. 

 S . Pygidium elongatum, planum, creberrime ocellato-punctatum, apice acuminato-recurvum; tibias posticae valde 

 arcuatae ; venter grosse sparsim punctato, segmentis 2 et 3 medio contractis suturisque subtilibus, flexuosis, 

 suturis 4 et 5 profunde sulcatis ; metasternum apice fovea magna. 



Long. 13 millim. 



Hal. Bkitish Honduras, Belize (Blancaneauac). One male example only. 



Unlike any other known species in its long, plane pygidium, with the apex upturned 

 and acute. The clypeus also is peculiar in being more prolonged than usual, and 

 narrowed to the front ; the two teeth lie as close together as in some species of Canthon ; 

 and on each side the margin is strongly angulated, with an additional short and acute 

 prominence at the suture dividing the clypeus from the gense. The sides of the thorax 

 in front of the median obtuse angle are straight and simple. The punctuation of the 

 upper surface does not differ from that of the Mexican var. of D. parile. 



3. Deltochilum gibbosum. 



Scarabaus gibbosus, Fabr. Syst. Ent. p. 28 * ; Oliv. Ent. i. 3, p. 154, t. 16. f. 151 b. 

 Eab. North America, Carolina *. 



Var. sublceve. Nitidior ; capite tboraceque baud alutaceis, crebre punctulatis, boc aequaliter convexo, juxta basin 

 punctis majoribus annularibus; elytris subtiliter punctato-striatis, interstitiis planis, crebre annulato- 



