160 LAMELLICOENIA. 



are from Presidio and Tejeria, and offer no other character to distinguish them from the 

 ordinary form of the species. 



A typical male specimen from Jalapa is figured. 



6. Diplotaxis nigriventris. 



D. trapeziferce exemplis minoribus similis, sed differt colore castaneo-fusco, subtus fusco-nigro, pedibus castaneo- 

 rufis ; clypeo minore, apice sat profunde sinuato ; corpore subtus pygidioque undique grosse et profunde 

 sed discrete punctatis. 



Long. 6| millim. 



Hab. Mexico, Presidio {lower). 



Evidently more distinct from the typical D. trapezifera than any of the varieties 

 described above. The clypeus is not quite so long, and is rather angularly sinuated on 

 its front edge. There is little or no difference in the form of the thorax or in the 

 sculpture of the upperside ; but the underside is thickly strewn with large circular 

 punctures. 



7. Diplotaxis nitidicollis. 



Diplotaxys nitidicollis, Blanch. Cat. Coll. Ent. i. p. 171 \ 



Hab. Mexico x ; Guatemala (Salle), Capetillo (Champion) ; Costa Rica, Volcan de 

 Irazu (Rogers). 



Three examples in the Salle collection labelled D. nitidicollis, Blanch., agree fairly 

 well with the description. The clypeus is short and broad, trapezoidal, with the front 

 edge sinuated and the angles slightly prominent but rounded and each side towards the 

 gense broadly and angularly sinuated. In the male the pygidium is flat, and the sixth 

 ventral segment exposed ; in the female it is convex, and the sixth segment concealed. 



8. Diplotaxis poropyge. 



Oblonga, convexa, erecte fulvo-pilosa, castanea interdum cuprascens, subnitida ; capite alveolato-punctato ; 

 clypeo brevi, trapezoidali, angulis latis obtusis sed prominulis, lateribus paullo sinuatis ; tborace grosse 

 punctato, angulis posticis fere rotundatis ; elytris sat dense et profunde sed discrete punctatis, interstitiis 

 suturalibus et costalibus sequaliter seriatis, costis haud elevatis ; propygidio et pygidio grossissime alveo- 

 latis, corpore subtus grosse discrete punctato, pygidio utroque sexu parvo subrotundato ; unguibus 

 normalibus. 



Long. 9-10 millim. 



Hab. Mexico, Cordova, Chiapas (Salle) ; Guatemala, San Geronimo, Paso Antonio, 

 Mirandilla (Champion). 



The punctuation of the elytra is peculiar, the row of punctures along the sutural 

 interstice and on the usual costse being as strong and close as the punctured striae 

 limiting the costse, the latter being only faintly indicated. 



