66 71/. A. Carriker 



a continvious, brownish patch fiUing ahnost the entire space be- 

 tween the lateral bands, and broken by only very faint pale 

 transverse lines at the sutures. 



Numerous specimens collected on Raiiipliocclns passerinii, 

 Juan Vinas, Costa Rica, March, 1902. 



Menopon difficile sp. nov., pi. VIII, firjr. 1 



Female. — Body, length 1.86 mm., width .70 mm.; clear smoky 

 brown, with broad, slightly darker transverse abdominal bands ; 

 narrow, pitchy, thoracic, lateral abdominal and ocular bands. 



Head, length .32 mm., width .53 mm.; lunate, with deeply 

 concave occipital border and small ocular emarginations ; palpi 

 projecting by the apical joint and antennae concealed; front 

 bare ; three long and two very fine hairs in front of the ocular 

 emargination ; ocular fringe meager ; temples flattened and 

 rounded with three long and two shorter hairs ; occipital margin 

 with a narrow blackish border and six slender hairs ; mandibles 

 small, with darkened tips ; a faint submarginal band encircling- 

 front of head beyond ocular emargination with a branch joining 

 the anterior portion of the heavy, blackish, ocular bands; a large 

 quadrilateral occipital spot with curving bands connecting its 

 anterior angles with the bases of the mandibles ; eye large, 

 rounded, with a black fleck. 



Prothorax ])road, pentagonal, with broadly rounded lateral 

 angles, furnished with two spines ; whole front from lateral an- 

 gles forward flatly convex ; sides almost straight, converging, 

 with two long hairs and a spine ; posterior angles obtuse, with 

 one long hair ; posterior margin truncate with six short hairs ; 

 whole segment deep smoky brown, with pitchy diagonal coxal 

 lines, and brown transverse chitin bands; a median, ventral 

 brown blotch. Metathorax scarcely larger than prothorax, with 

 sides straight and broadly diverging; a slight lateral constric- 

 tion at the mesothoracic suture ; posterior angles acute, with one 

 hair and one spine; posterior margin flatly rounded, with about 

 sixteen short hairs ; anterior angles with a short pitchy band and 

 curving pitchy meso-coxal bands ; dark brown meta-coxal bands, 

 curving backward from mesothoracic sutures, across lateral por- 



188 



