BRACHYGLUTINI 189 



little smaller and more truncate-ovoidal in outline in contrast to the larger, 

 irregularly ovoidal depression of the paratype. These differences do not seem 

 to warrant specific rank. 



Key to Males of Group VI 



Fourth antennal segment very swollen on mesial face and much wider 

 than either third or fifth segments 2 



Fourth antennal segment not conspicuously wider than the third and 

 fifth segments 4 



2. Known only from Brazil 3 



Known only from Panama Canal Zone chichion new species 



3. Intermediate femora greatly dilated dorsally, with the dilation bearing 



an apically directed tooth and abruptly excavated, this excavation 

 having two strong, parallel carinae, apical to the excavation the 

 femora are suddenly obconically pedunculate; antennal segments 



VII and VIII short and transverse, slightly produced on mesial 

 face; length 1.4 mm torticorne 



Intermediate femora differently modified ; antennal segments VII and 



VIII more 'transverse ; not as long nanum 



4. Fourth antennal segment with the mesial face produced suddenly at 



middle into a truncated process rugulosum 



Fourth antennal segment not produced mesially or if so, the mesial 

 face of the segment is evenly developed 5 



5. Known only from Grenada, Windward Islands insulare 



Known either from Mexico or Guatemala 6 



6. Third antennal segment relatively very large, longer than any anten- 



nal segment save the tenth, obtusely prominent mesially 



punctatum 



Third antennal segment never longer than ninth segment 7 



7. Seventh antennal segment quadrate to transverse, lateral face never 



produced, mesial face produced or not 8 



Seventh antennal segment transverse, very obliquely truncate at apex, 

 lateral face produced, much larger than mesial face. . . .squamosum 



8. Seventh antennal segment with the mesial face produced 



quadrifoveatum 



Seventh antennal segment with mesial face not produced 9 



9. Intermediate femora swollen, but the swelling evenly developed on the 



dorsal face, this face slightly emarginate with the edge of the 

 emargination bidentate and a recurved, narrow sulcus below the 



emarginated edge; 1.6 mm. long quadraticeps 



Intermediate femora otherwise modified 10 



10. Intermediate femora triangularly swollen in the middle of the dorsal 

 face, this dilation bearing at dorsal apex an apically directed spine 

 and the swelling bearing a broadly semilunar excavation ; the apical 

 fourth of femur set apart from basal three-fourths by a sudden 



