Mallof^Iiaga from Birds of Costa Rica, Central .Imcrica 57 



Menopon ortalidis sp. nov., pi. VII, fig. 1 



Mali:. — Body, length 1.81 mm., width .71 mm.; very pale 

 throughout, with onl}' a faint tawny tinge; markings of head and 

 thorax and lateral spots of the abdomen light smoky brown. 



Head, length .^y mm., width .54 mm. ; front, beyond ocular 

 emargination, almost evenly rounded, with two short, fine hairs 

 near the middle, two more just back of the projecting palpi, and 

 two longer ones arising just in front of the ocular emargination; 

 the ocular emargination shallow with a strong fringe of hairs ; 

 the temples slightly drawn out latero-posteriorly, with five long, 

 stout hairs, four of which are pustulated ; occipital margin con- 

 cave, bare, with a slight, marginal, dusky band on each side of 

 the occiput; the mandibles small, cinereous, and placed near the 

 front of the head; palpi long and stout, projecting by nearly 

 all of the last two segments; just behind the base of each palpus 

 is a dark cinereous, cone-shaped protuberance, between which 

 are two short dorsal hairs ; the eye is large, clear, with a short 

 hair and partly obscured by a large black Heck on the anterior 

 side; the antennae rather stout, apical joint much the largest, 

 nearly globular, and projecting by a trifle more than half its 

 length ; a dark band along the inner border of the ocular depres- 

 sion ; pale smoky, occipital bands, curving from each side of the 

 occiput to the anterior margin of the ocular depression ; three 

 short, dorsal hairs along each occipital band. 



Prothorax very large, nearly as broad as the head and almost 

 hexagonal in shape ; lateral lobes expanded, dusky, and lateral 

 angles bluntly rounded, with one short spine ; the postero-lateral 

 margins with six long hairs, and the posterior margin with four 

 shorter ones ; narrow, dusky bands start from the median por- 

 tion of the antero-lateral margins, curve gently backward nearly 

 to the posterior margin, then bend inward and unite, the whole 

 enclosing a nearly quadrilateral space ; fainter narrow bands run 

 diagonally backward from the anterior corners of this quadri- 

 lateral, nearly to the center of the segment, joining a faint ventral 

 spot ; a still fainter band connects these diagonal bands trans- 

 versely. Metathorax about the same size as the prothorax, 

 with straight, diverging sides, and flatly rounded posterior mar- 



ijy 



