226 SEEKICOENIA. 



joint of the antennas is small, as will be seen in the less sharply limited inner border of 

 the antennal groove. 



Owing to the relatively large number of species added to the Central-American 

 fauna, the following Table has been prepared to assist in their identification : — 



1. Second joint of the antennae shorter than the fourth; inner border of 



the antennal groove very sharply defined 2. 



Second joint of the antennas equal to or longer than the fourth ; inner 



border of the antennal groove not sharply defined 9. 



2. Epipleurse punctate and not sulcate 3. 



Epipleurse smooth, grooved their entire length 8. 



3. Species bicoloured or ornate 4. 



Species uniform in colour o. 



4. Elytra piceous-black. 



Head, thorax, and greater part of the underside orange-yellow ; 



mesopleura? smooth in front atripennis. 



Head and thorax orange-yellow, the latter with a median stripe and 



narrow lateral border black ; mesopleurse punctate .... notabilis. 

 Elytra with two oblong ferruginous spots on each. 



Thorax ferruginous, with broad median and lateral piceous stripes . variipennis. 



5. Pronotum rugosely sculptured, the intervals between the punctures 



more or less elevated 6. 



Pronotum simply punctate, the intervals between the punctures smooth. 7. 



6. Intercoxal process of the prosternum parallel-sided infrequens. 



Intercoxal process of the prosternum more or less convergent to the 



apex affinis. 



7. Thorax closely punctate ; above uniformly coloured. 



Elytra parallel in their basal half confusus. 



Elytra gradually attenuate from the base to the apex petitii. 



Thorax sparsely punctate on the disc and posteriorly ; thorax piceous ; 

 elytra castaneous ; last ventral segment with a central perforation 

 (sexual ?) castaneipennis. 



8. Last ventral segment acutely oval at the tip. 



Antennal groove not half as wide as the propleural triangle. 



Pronotum simply punctate, not rugose mendax. 



Pronotum punctate and rugose, more especially when viewed 



from behind obrutus. 



Antennal groove nearly as wide as the propleural triangle . . . sceleratus. 

 Last ventral segment sinuate on each side and acutely prolonged ; 



mesopleurse quite smooth in front truncatus. 



9. Interocular carina more or less interrupted at the middle . . . . 10. 

 Iiiterocular carina continuous across the clypeus ; clypeus usually with 



a median carina, this sometimes rather short or absent . . . adjectus. 



10. Head with sharply-defined carina at the middle carinifrons. 



Head not carinate insitus. 



