PSOCIDiE. 
Ins. 263 
that of Psocus, but the pterostigma has a rudimentary spur-vein at its 
lower angle. Body (especially in $ ) clothed with incrassate hairs. 
Type, N. rhenanns , sp. n., ibid., Rhenish Prussia (under a stone). 
Bertkauia , id. 1. c. p. 208. Apterous ; no ocelli ; prothorax distinct ; 
antennae 13-jointed ; tarsi bi-articulate ; maxillary palpi long and thin, 
with acuminate terminal joint. (Placed in the division Psocina.) Type, 
B. prisca, sp. n., Siebengebirge (under stones). 
Pseudopsocus, id. ibid. Apterous; ocelli prominent; antennae 13- 
jointed ; tarsi tri-articulate ; prothorax free. (Placed in the division 
Psocina .) Type, P. rosiocki, sp. n., p. 209, Westphalia. 
Cerobasis {Atropina) id. p. 212. Antennae 18-jointed ; tarsi tri-articu- 
late ; no wing-scales. Allied to Hyperetes ; type, C. muraria , sp. n. f 
ibid., Westphalia. 
Tichobia ( Atropina ) id. ibid. Antennae 14-jointed ; tarsi tri-articu- 
late ; no wing-scales ; palpi not spurred. Type, T. alternans, sp. n., 
ibid., Westphalia. 
Cerastis , id. S. E. Z. xliv. p. G5. Allied to Psocus (restricted), but the 
first discoidal areole of the anterior wings twice or thrice larger than the 
second, &c. Includes Psocus venosus, Burm. (and var. n. mexicana, p. 75, 
Mexico), fuscipennis, Burm., infectus, McLach., and the following 
spp. nn. : — crassicornis , p. 70, Brazil, colorata, p. 71, Brazil, ocularis , 
p. 72, Brazil, mcesta, ibid., Colombia, pallidinervis, p. 73, Colombia, bogo- 
tana , ibid., Bogota, vetusta , p. 74, Colombia. A species is indicated in the 
table at p. 70, as “ nigrofasciata, Hag.’’ (with a var. elegantula, at 
p. 75, from Yenezuela) ; this is probably P. trifasciatus, Provancher. 
Syngonosoma, id. 1. c. p. 76. Allied to Eremopsocus, but the antennas 
13-jointod, and only tho third and fourth joints thickened, &c. ; type, 
S. / lagellicornc , sp. n., p. 78, Colombia. 
Blastc, id. 1. c. p. 79. Allied to Amplngerontia ; differs in the form of 
the pterostigma, &c. ; type, B. juvenilis, sp. n., p. 80, Pennsylvania. 
Trocticus (Atropina), Bertkau, Arch. f. Nat. xlix. p. 99. No ocelli; 
wings rudimentary; antennas threadlike, 13-jointed; type, T. gibbulus, 
sp. n., id. 1. c. pi. i. fig. 2, Rhenish Prussia (= the short-wiuged form of 
Mesopsocus unipunctatus , Muller ; cf. Bertkau, Yerh. Yer. Rheinl. xxxix. 
p. 128). 
Lapithes, id. 1. c. p. 100. Type, L. pulicarius, sp. n., id. ibid. pi. i. fig. 3 
(= Bertkauia prisca, Kolbe, see supra ; cf. Bertkau, l.c. p. 128). 
Kolbia , id. Yerh. Yer. Rheinl. xxxix. p. 129. Allied to Ccecilius, 
differs in the pterostigma being elongate, and not dilated at the end, in 
the short tenth-joint of the antennas, in the rudimentary wings of the 
5 , &c. Type, K. quisquiliarum, sp. n., ibid., Rhenish Prussia (under 
stones). 
^ Archipsocus, Hagen, S. E. Z. xliii. p. 225. Allied to Empheria, but the 
imperfect neuration and long first-joint of the palpi separate it from all 
known genera ; type, A. puber, sp. n., p. 222, pi. i. fig. 10 (fossil in 
amber). 
Splicer opsocus, id. 1. c. p. 230. A remarkable genus with elytriform 
anterior wings ; type, S: kunowii, sp. n., p. 226, pi. ii. fig. 1 (fossil in 
amber). 
