BRACHYGLUTINI 179 



tudinal carina of varying height, marking the fusion of the mesial margins 

 of the genal sclerites, the primitive gular sclerite not being in evidence; on 

 each side of the median carina is a more or less biarcuate lateral carina which 

 arises near the base of a mandible and extends to the posterior margin of the 

 head; finally, there is a pair of ocular carinae. It is with these ocular carinae 

 that we are especially concerned. They appear to be constant for a species, 

 but show no discernible sexual modification and hence should serve in the 

 separation of closely allied genera. For example (1) in Xybarida nasicola 

 the ocular carina arises anterior to each eye, passes post^ro-ventrally, and 

 unites with the lateral carina without touching the eye at any point (PI. VII, 

 10) ; (2) in Xybaris funiculis the ocular carina arises at the anterior margin 

 of the eye, passes postero-ventrally, and unites with the lateral carina; this 

 ocular carina is in contact with the eye for most of its course (PI. VII, 11) ; 

 (3) In Berdura dentipalpa and Scalenarthrus undecimtympus the ocular carina 

 arises from the median-ventral margin of the eye and passes ventrally to 

 join the lateral carina at nearly a right angle (PI. VII, 12). 



The eight species of the genus Xybaris may be listed as follows: 



spiniceps Reitter. 1882. Sao Paulo, Brazil. Genotype. 



triangulifera (Schaufuss). 1887. Minas Geraes, Brazil. (Bryaxis) 



sahlbergi Reitter. 1882. Petropolis, Brazil. 



quadraticeps Raffray. 1904. Brazil. 



atomaria Raffray. 1904. Blumenau, Brazil. 



troglocera Reitter. 1882. Brazil. 



excisa Raffray. 1909. Sao Paulo, Brazil. 



funiculis new species. Panama Canal Zone. 



CRYPTORHINULA (Schaufuss, 1887) 



This specialized, wholly neotropical genus is closely allied to Xybaris. 

 The center appears to be in Brazil, the species also being found in Venezuela 

 and as far north as Guatemala. 



The head is relatively large, subquadrate, with vertex simple and flattened 

 to slightly vaulted; vertex separated from the front by a transverse, entire 

 sulcus; front usually simple, truncate, and usually transversely elevated be- 

 tween the antennal bases (in some males the front has a median setose tubercle) ; 

 the two vertexal foveae vary from minute to small and are free ; ventral surface 

 of the head with a median, and on each side a lateral, longitudinal carina. 

 Maxillary palpi as in Xybaris. Antennae as in Xybaris save that (a) the second 

 segment is not swollen in Cryptorhinula males and is often swollen or dilated 

 in Xybaris males, and (b) the eleventh antennal segment in the males of some 

 Cryptorhinula is of irregular form and may be toothed at base. 



The tarsi are elongate, slender, with the second tarsomere slight]}'- longer 

 than the third, and a little thicker (in oedipu^, which may not belong in this 

 genus, the anterior tarsi of the male (?) sex is said to be peculiarly swollen). 

 This condition is normal for the male Xybaris, among other genera, but not 

 typical for Cryptorhinula. 



