Hagen.] 374 [January 22, 



joints, and a long blackisli terminal seta; tlie basal joint is mostly 

 concealed in the large orbit. 



Prothorax black-brown, much broader than the head, flat, short 

 rounded behind, the margin a little emarginated in the middle. Tho- 

 rax brown, polished above, pale beneath, stout, cordiform and sub- 

 inflated behind. Abdomen light brown, beneath paler, conic, a httle 

 depressed, the lateral margins produced into teeth, more noticeable 

 in the jjenultimate segment; the ultimate segment truncated; the 

 oviparous lobe on the antepenultimate ventral segment oblong, rather 

 broader than long, the margin a little emarginated ; a m;iss of green- 

 ish eggs is jirotruded. The two abdominal setifi white, a little shorter 

 than the abdomen (the end is broken), slender, with short joints, 

 glabrous, with very little pubescence at the tips. Legs black, the 

 basal articulation very much developed; the femora probably stout 

 and short; the tibiae and tarsi atrophied, not adapted for an accurate 

 description in the dry state. 



Wings grayish, semi-opaque, without ribs at the margins; fore wings 

 long, broad, triangular, with four very strong longitudinal, grayish 

 brown veins; the first, third and fourth, furcate from behind about 

 the middle ; the furcate vein of the third not so strong as those of the 

 others; the furcate vein of the fourth going to the middle of the abdo- 

 minal margin. Three strong transversal veins (no others exist) about 

 in the middle of the wing, rather nearer to the tip, unite the first 

 with its furca, the second and the third; but the transversals are not 

 always exactly in the same line; at the base of the fore wing is a long, 

 very small membranous appendage lodged under the prominent edge 

 of the mesothorax as in OUgoneuria. Hind Aving not in good condi- 

 tion for examination ; it seems to have three longitudinal veins, the 

 middle furcated ; no transversal veins. The fore border of the hind 

 wings is very closely pressed against the corresponding border of the 

 fore wings, as in OUgoneuria. The border seems to be more opaque 

 and scabrous than the rest of the wing. 



The character of the genus Lachlania can not be given completely, 

 until the male is known. But it is evident that the species can not 

 be placed under OUgoneuria. Two abdominal setse instead of three, 

 and three strong transversal veins in the middle of the wing are the 

 the most evident characteristics of Lachlania. The last is very 

 excejitional in the family of the Ephemerina, and gives to the animal 

 a very strange and abnormal ajjpearance. 



Dr. Hagen further remarked that Mr. Burgess had kindly 

 communicated to him two american species of Psocus ar- 

 ranged as microscopical objects. 



