332 



the apicial half and inner margin of the basal half of the upper wings, 

 and abdomen beneath, fuscous. Length to tips of the closed wings .12 in. 

 On fence in Cambridge, Sept. 8, 1837. 



Body pale greenish yellow; head, clypeus and vertex fuscous; eyes brown; 

 antennas shorter than the wings, simple, blackish. Disk of the mesothorax 

 fuscous, superior wings greenish yellow at base, slightly fuscous at tip; ner- 

 vures from the middle to the apex, and inner margin from the base to the 

 middle, fuscous. Abdomen lineated with fuscous beneath. 



This is the smallest winged species which is known to me. 



Psocus infuscatus Harr. MSS. [P. sparsus Hag.] 



On a fence, eating the decayed wood, in the larval and perfect state, Aug. 

 1, 1837. In little troops or swarms. 



Whitish, variegated with fuscous, upper wings with a large spot on the 

 middle of the outer margin, and two small spots on the inner margin, white. 

 Varies in being large, and lighter colored, with an oblique fuscous fascia on 

 the upper wings (9) and smaller, darker, the fascia obsolete (<J). 



Yellowish (or greenish) white, variegated with light and dark fuscous; 

 two spots on the thorax, middle of the thighs, tips of the tibia; and of the 

 tarsi, black; articulations of the antennae, and carpal spot on the tipper 

 wings whitish; abdomen trilineate with fuscous. Head and prothorax 

 minutely punctured with black. Front with five vertical or longitudinal, 

 fuscous lines, one central, one beneath each eye, and one somewhat curved 

 between the frontal and subocular lines; vertex with a fuscous spot. 

 Thorax with two transversely arranged black spots; metathorax with a 

 dorsal fuscous line, and another lateral one below the wings on the pleura. 

 Upper wings minutely spotted and variegated with fuscous ; the spots form- 

 ing an obsolete oblique fascia before the middle and across the apex, and 

 four blackish lunules at the apicial margin; outer margin with a large, 

 irregular, whitish, carpal spot; nervures white, dotted with black; lower 

 wings whitish, with fuscous veins. Abdomen trilineate with fuscous; 

 darker beneath. Legs whitish; thighs with a blackish annulus on the 

 middle (sometimes wanting) ; tips of tibiae and tarsi at the end blackish. 

 Antenna; fuscous, with whitish articulations. The larger specimens (9 '?) 

 are paler. 



This species differs from all those described and figured by Coquebert, 

 Decas I, Tab. 2, approaching, however, to the lineatus and varierjalus of 

 Latreille, but evidently distinct from both. 



Psocus gracilis Harr. MSS. [P. signatus Hag.] 



Body black, front white, lineated with black; wings hyaline, the superior 



