304 bulletin: icubeum 01 comparative eoo*logy. 



long pedicel; Btigma slightly rounded behind, its outer Bide aboul one half the 

 length of its inner tide. Front tarsus with first joint a little longer than the 

 ■ ml, in bind tarsus first joint more than twice the second. 

 Length 4 mm. 



Ps<X i a MEMORIALI8, QOV. sp. 



Type.— M. C. Z. 10,804. Colombia: Caldras, 4,400 ft. (H. Fassl). 



Pale, marked with brown; nose Lineate, vertex Bhining brown in the middle; 

 antennae dark, finely short-haired; thorax shining brown ; the Butures pale; 



abdomen brown; legs pale, tarsi darker. Willis hardly clear, veins brown, 



Btigma brown, and a brown spot at the anal angle, lower side of the discal cell 

 and the forking of the radial sector whitish hyaline; stigma long, rounded 

 behind; discal cell touching the radial sector at one point or for a sh<»rt distance, 

 the cell much longer than broad, and narrowed below, inner side plainly con- 

 vex. The wings are rather more slender than usual. In front tarsus first 

 joint is as long as second, in hind tarsus first joint is about twice as long as 

 the second. 

 Length 4 mm. 



PSOCUS LEPIDUS, Sp. IIOY. 



Type.— M. C. Z. 10,810. Brazil (Winthem coll.). 



Head pale yellowish; a black stripe each side from eyes to mouth, nose with 

 a large, median blackish stripe, clypeus black; vertex and front with a large 

 median dark spot extending each side on vertex in a rounded spot, and each 

 side of vertex extending down obliquely toward base of antennae; antennae 

 very fine, pale, beyond third joint darker, with few fine hairs; palpi black, 

 except most of basal joint; thorax shining blackish, pale on sutures; lower 

 part of pleura black; legs mostly black, basal part of femora and a band before 

 tip pale, tibia with subbasal and preapical pale bands, and most of first tarsal 

 joint pale; front tarsus has first joint fully twice as long as second joint, in 

 hind tarsus the first joint fully four times as long as the second. Abdomen 

 dark, some pale spots on sides and on venter. Wings hyaline; stigma angulate 

 behind, inner side concave, outer side convex, stigma hardly its length from 

 tip of wing; radial sector forks just before the angle of stigma, the pedicel 

 more than one half as long as fork; discal cell connected to radial sector by a 

 short pedicel, inner side convex, outer straight; first and second posterior cells 

 about equal at base, and longer than the areola postica. Veins dark, forking 

 of radial sector, lower outer and lower inner angle of discal cell, and the con- 

 necting veinlet to hind margin are whitish hyaline; stigma dark, basal part, 

 except extreme base, yellowish; a dark mark extends the angle of stigma 

 nearly to the next vein; distinct spot at end of anal vein, and several veins 

 near cell margined with black. 



Length 7 mm. 



