146 NEOTROPICAL PSELAPHIDAE 



eucera (Aube). 1844. Puerto Rico. {Bryaxis) 

 fovearthra new species. Panama Canal Zone. 

 guadalupensis Raffray. 1908. Guadeloupe, Leeward Islands. 

 mexicana Raffray. 1904. Mexico. 



sallaei (Sharp). 1887. Mexico, Guatemala, Panama. (Bryaxis) 



(sallei Raffray, 1908, nee Sharp) 



Group XLVII 



The neotropical representatives of this group have been contributed by 

 Fletcher, and have few affinities with the rest of the group, the outstanding 

 parallel being the possession of swollen tibiae of the posterior legs. These two 

 neotropical species have the male sex characterized by (1) swollen hind tibiae, 

 and (2) mandibles with a tooth on the external face; the females have simple 

 hind tibiae and normal mandibles. 



Mandibles each with a small tooth on the external face; posterior 

 tibiae swollen 2 



Mandibles and tibiae simple Females 



2. External mandibular tooth forming an acute angle with the mandibu- 

 lar curvature; posterior tibiae strongly dilated externally with an 



elongate median depression beneath; length 1.6 mm 



Male latipes (PI. XVI, 2) 



External mandibular tooth forming an obtuse angle with the mandibu- 

 lar curvature ; posterior tibiae strongly dilated but lacking an elon- 

 gate median depression beneath; length 1.4 mm. (PI. XVI, 1) 

 Male guatemalensis 



guatemalensis Fletcher. 1928. Guatemala. 

 latipes Fletcher. 1928. Mexico. 



Group LI 

 The fifty-first group contains but one species: 

 nasalis (Reitter). 1900. Brazil. (Bryaxis). (nasuta Reitter, 1882). 



Group LII 



The fifty-second group contains two species, but the remarks anent the 

 fifty-sixth group should be considered for a more complete picture. The repre- 

 sentatives of this group are specialized with respect to the vertexal foveae: 

 the two foveae between the eyes are normal, but the third fovea, (which is 

 generally of the same size and located on the top of the head, between the 

 antennal bases, near the front) , is here much smaller and placed on the abruptly 

 declivous front, so that it occupies a plane at nearly right angles to the two 

 vertexal foveae. This foveal arrangement is common to both sexes, where the 

 female sex is known, and forms a transition to those species where this frontal 

 fovea is wholly absent. 



