72 Mr. J. O. Westwood on Atropos Pulsatoria. 
third figure of this plate, which represents a totally different in- 
sect, belonging to a different genus, having four rudimental wings, 
slender legs, and uniform segments of the thorax, and which is, I 
apprehend, the pupa of a male Psocus, such as I have figured in 
my Introduction, fig. 59,10. Burmeister in his generic character 
of Troctes (or Atropos) refers however to another figure of De 
Geer, (namely, tab. 4, fig. 1,) which represents an apterous speci- 
men with uniform segments, with simple hind legs, and with long 
antennz, which he describes as 18-jointed. This, however, is 
clearly distinct, both specifically and generically, from Atropos. 
Again, Burmeister refers to Latreille’s figure of Psocus pulsato- 
rius, given in Coquebert’s Illustratio Iconographica, tab. 2, f. 14, 
but that figure is either inaccurate (representing the thoracic 
segments as very short and equal, and the hind legs simple) or the 
reference to it by Burmeister is incorrect. 
But the more immediate object of this communication is to men- 
tion the discovery of a species possessing as many as twenty-seven 
joints in the antenna, and as this species is a domestic one, I trust 
that the discovery will be deemed to possess an additional interest 
on that account. I have found it amongst books, crawling in 
fact over the pages of one of the volumes of Mr. Stephens’s Illus- 
trations, a circumstance I mention as in some degree showing it 
to be a native species, for had I found it on a newly received 
foreign work I might have doubted this. It is three times the 
size of Atropos pulsatoria. I have named it, after one of the 
Fates, Clotho, having used the name of Lachesis, or rather a dimi- 
nutive thereof, for Psocus fatidicus, and the name of the third 
Fate, Atropos, having been given to Psocus pulsatorius. 
CLoTHiLLa. 
Corpus parvum, apterum ; capite subtriangulare (haud oblongo- 
quadrato) ; thorace capite vix latiori, abdomine ovato, sub- 
convexo. 
Antenne longe, gracillime, articulis circiter 27, duobus basalibus 
crassis. Prothorax segmentis aliis thoracicis brevior. Pedes 
simplices, tarsis 3-articulatis. 
Clothilla studiosa, Westw. 
Luteo-albida, oculis brunneis, antennis fuscis, labro albido, 
incisuris abdominis brunneis ; pedibusque albidis. 
Long. corp. lin. 1. 
Habitat in domu meA, super libros cursitans. 
