BALCLUTHA — BLOCKJER 



39 



Nebraska, Nevada, New Mexico, North Carolina, North Dakota, 

 Ohio, Oklahoma, Oregon, South Dakota, Texas, Utah, Washington, 

 Wisconsin, Wyoming, Ontario, and Manitoba. Other material 

 examined was from Mexico, Puerto Rico, Panama, Ecuador, Peru, 

 and Chile. 



B. neglecta (DeLong and Davidson) is closely related to B. aridula 

 Linnavuori from which it can be distinguished by the curvature of the 

 aedeagus (see key). 



BalclutJia aridula Liiinaviiori 



Figure 24 

 Baldutha aridula Linnavuori, 1959, Ann. Zool. Soc. 'Vanamo,' vol. 20, p. 344. 



Length of male 2.8 to 3.5 mm, of female 3.1 to 3.8 mm; head width 

 of male .700 to .850 mm, of female .750 to .900 mm; pronotal width 

 of male .675 to .825 mm, of female .725 to .900 mm. 



Head as wide as or wider than pronotum; vertex as long next to eye 

 as medially or slightly longer medially, interocular width approxi- 



FiGURE 24. — B. aridula: a, aedeagus, lateral view; b, style and connective, dorsal view; c, 

 valve and plate, ventral view; d, male pygofer, lateral view; e, female abdominal sternum 

 VII, ventral view. 



mately three times median length; ocellus located at a distance of 

 from 1 to IK times its diameter from eye; anteclypeus parallel sided, 

 exceeding gena; postclypeal sutures usually curved mesally above 

 antennal pits; pronotum with length varying from slightly less 

 than to 3 times as long as vertex; hind femoral chaetotaxy 2-1-1, 

 female with posterior margin of abdominal sterniun VII shallowly 

 concave, with a heavily sclerotized band extending along posterior 

 margin. 



