1867.] 275 
3. — Elipsocus kyalinus, Stephens. 
Fsoctcs hjalinus, Steph. 111. p. 123, 23 (1830) ; Hag. Ent. Ann. 1801, p. 
20, 10. P. "l-imnctatus, Steph. 111. p. 123, 24, nee. Linn. P. Q-imnc- 
tatus, Steph. 111. p. 123, 25, nee. Linn. 
Antenna' not so long as the wings, dark fuscous. Head pale shining brown, 
without markings ; eyes and ocelli black. Thorax dark shining blackish-fuscous. 
Abdomen i->ale yellow with a fuscous apex, Legrs brownish. TTmj/s hyaline ; anterior 
wings rather elongate, a fuscous zig-zag transverse fascia follows the course of the 
veins in the middle ; pterostigma semi-ovate, occupied by a dark fuscous spot ; free 
marginal cellule elliptical, margined with dark fuscous ; veins moderately ciliated, 
blackish. The markings vary much in intensity according to the degree of maturity 
attained. Length of body 1"' ; expanse of fore-wings 3"'. 
Very similar to the last, but smaller, and may be at once dis- 
tinguished by its yellow abdomen, tipped with fuscous. 
Hagen places hyalinus in Gcecilius, but the types of all three of 
Stephens' species have 3-jointed tarsi, as is also the case with individuals 
taken by myself and compared with the types. 
4. — Elipsocus flaviceps, Stephens (Plate 2, figs. 9 and 10). 
Psocus flaviceps, Steph. 111. p. 124, 28 (1830) ; Hag. Ent. Ann. 1801, 
p. 20, 11. -P. striatulus, Steph. 111. p. 124, 27, nee. Fab. P. lasiop- 
terus, Burm. Haudb. 2 p. 777, 5 (1839). CceciliusirroraUis, Curt. B. E, 
648, 27 (1337). 
Antennw not so long as the wings, pilose in J , fuscous. Head yellow (some- 
times wholly brown) ; croiun spotted with blackish ; nasus with few convergent 
brown lines. Thorax brown varied with yellow, or wholly brown. Abdomen 
brown vnth lateral yellow lines. Wings varying from hyaline to smoky ; anterior 
wings very variable in their markings ; in the most strongly marked form they are 
strongly spotted with fuscous, with a semicircular row of fuscous spots in the apical 
cellules, most of the veins and the lower edge of the semicircular pterostigma 
margined with fuscous ; in the least marked form these wings shew little trace of 
the dark markings, save a perceptible margining of the veins ; and all intermediate 
conditions occur ; veins dark brown, strongly ciliated ; free posterior cellule small. 
Length of body 1-li'" ; expanse of fore-wings 3-3^"'. 
Common amongst the foliage of firs, larches, and yews. 
This, to me, has been the most puzzling of all the Psocidce. The 
varieties into which it runs are so numerous that it yet seems doubtful 
if thei^e may not be more than one species, yet I have beaten all the 
forms at the same time from one small larch-tree. The strongly 
ciliated veins seem to afford the best character. Although placed by 
Hagen in a different group, Stephens' types appear certainly to have 
3-jointed tarsi, which is also the case with all similar examples in my, 
