BALCLUTHA — BLOCKER 



19 



Holotype male, Costa Rica (Pablo Schild), in U.S. National 

 Museum. This species was described from a single specimen of which 

 only the head, prothorax, and abdomen remain. 



B. kraineri, new species, is related to B. ahdominalis (Van Duzee) 

 but can be easily distinguished by the shape of the aedeagus which 

 is distinctive (see key) . This species is named in honor of Dr. James P. 

 Kramer of the U.S. National Museum, who furnished the author 

 much of the material used in this study and made many valuable 

 suggestions during the time that this research was being conducted. 



Balclutha ahdominalis ahdominalis (Van Duzee) 



Figure 10 



Gnathodus ahdominalis Van Duzee, 1S92, Canadian Ent., vol. 24, p. 113. 

 Balclutha hyalina Osborn, 1926, Ann. Ent. Soc. America, vol. 19, p. 352. [New 

 synonymy.] 



Length of male 3.0 to 3.5 mm, of female 3.5 to 3.6 mm; head width 

 of male .675 to .775 mm, of female .775 to .850 mm; pronotal width 

 of male .700 to .850 mm, of female .825 to .875 mm. 



J 



Figure 10. — B. a. ahdominalis: a-c, aedeagus, lateral view; d, e, aedeagus, postero ventral 

 view; /, style and connective, dorsal view; g, male pygofer, lateral view; h, valve and 

 plate, ventral view; i, j, female abdominal sternum VII, ventral view. 



