312 NEOTROPICAL PSELAPHIDAE 



Antennal segment XI lacking such a foveiform depression 9 



9. Elytra punctate, the flanks wrinkled and the punctures granulose on 



the sides Group VII 



Elytra either lightly punctulate or impunctate 10 



10. General body pubescence deep brown Group VIII 



General body pubescence tawny to yellowish-brown Group IX 



Key to the Subgeneric Groups of Hamotoides 



Median pronotal fovea very large and strongly formed, with the trans- 

 verse sulcus seen from each side of the foveal lumen as a sharply 



narrower groove. (PI. XVII, 5) Group XII 



Median pronotal fovea either very small, or formed by a slight 

 arcuation of the walls of the transverse sulcus or wholly absent. 



(PI. XVII, 4) 2 



2. General body pubescence deep brown Group XIII 



General body pubescence varying from yellow to yellowish-brown or 



tawny Group XIV ^ 



This organization is an extension of the 1904 arrangement of Raffray, 

 and divides the genus into fourteen groups of species. In the following keys 

 to species the term "palpal sulcus" refers to the longitudinal sulcus of the 

 internal face of the distal segment of the maxillary palpus, and the Roman 

 numerals refer to antennal segments. 



Key to Species of Group I 



V, VI, VII three times longer than wide 2 



V, VI, VII quadrate to transverse 6 



2. Metasternum tuberculate or spined 3 



Metasternum simple 5 



3. Metasternum with a pair of long spinoid processes at base, these 



processes compressed and curved near apex; 3.4 mm.; Bolivia 



sternalis Male 



Metasternum with two strong tubercles 4 



4. XI not twice as long as wide; 3.0 mm.; Panama rostratus Male 



XI slightly more than twice as long as wide ; 3.5 mm. ; Panama .... 



grandipalpis Male 



5. 3.4 mm. ; Bolivia sternalis Female 



6. First visible tergite distinctly longer than second 7 



First and second tergites subequal in length 9 



7. Known from Buenos Aires, Argentina ; 3.3 mm argentinus 



Known from Blumenau, Brazil northwards 8 



8. XI regularly ovoidal, longer than the preceding two united; Brazil 



and Colombia gracilicornis 



XI elongate, longer than the three preceding united ; Colombia . . badius 



Rarely the pubescence is a silvery gray. 



