226 L March, 
thorace longitudine wquales, picece '. articulus Z^^^ oblique insertus ; 
4*"* exkis incrassatus,lohatus. Pedes pi cei ; coxce nigrcv nisi apice ; 
femora medio infuscata. Alee amplw, suhfuscw, disco saturatiores ; 
linea longitudinalis utrinque abhreviata, albida. Tegulcv ferruginecB. 
Abdomen ovattim, brevius quam prwcedenti, magis convexum, fortius 
basi sulcatum. 
$ differt atitennis totis nigris, capite cum tJiorace brevioribus, 
apice sensim clavatis, articulis 3, 4, simpUcibus. Terebra sub-exserta, 
ferruginea. 
(J ? . Long. 1\ ; alar. esp. 3 lin. 
Common in Swithland Woods, Leicestershire, among dead leaves 
in damp places, July, August. 
Milford, Ja7iuanj, 1867. 
A MONOGRAPH OF THE BRITISH P80CIDM. 
BY E. m'lACHLAK, F.L.S. 
{Continued from p. 181.) 
'B.— Ocelli present. (FSOOINA.) 
In this division come all the species which have hitherto been 
generally included in one genus, Fsocus : but already, in 1837, Curtis 
separated certain species under the generic term Ccecilius, and a more 
extensive acquaintance with exotic forms has rendered a still further 
division necessary. This has been done by Hagen in his " Synopsis 
Psocinorum synonymica," and his genera are adopted here. The 
general characters of the division are as follow : 
Antennte about 13-jointecl ; tlie two basal joints short, the rest long, but 
gradually decreasing in length, pilose in the male (probably the joints are always 
13 in British genera, but the exact discrimination of the apical ones is sometimes 
difficult). Head transverse, triangular j the crown provided with three evident, 
and often prominent, ocelli ; the front is tumid, and forms a strongly convex piece, 
termed the nasus. Eyes large and prominent ; larger and placed closer together 
in the male than in the female. Lahnmi large and convex. Ma/ndihles strong and 
corneous, trigonate, toothed within (the teeth unequal in the two mandibles, 
according to Westwood). Maxillary palpi 4<-jointed, the terminal joint somewhat 
clavate. Labial paVpi rudimentary. FrotTiorax scarcely evident. Mesothorax very 
large, strongly convex, divided into three lobes. Metathorax equal in breadth mth 
the inesotliorax, transversely sub-quadrate, convex. Abdomen small, oval. Legs 
moderately long, slender; the /eHi07-a very slightly dilated; tarni 2- or 3-jointed, 
the terminal joint with strong claws (when 3-jointed, the second or middle joint is 
the smallest). 
