Famity—CAMPODIDA. 195 
setigero, interno tenuissimo, membranaceo, margine sub-spinuloso; palpi maxillares quadriarticulati, articulo 
ultimo conico (fig. 1a); mentum (fig. 14*) oblongum, corneum, jugulo transverso antice insidens lobisque 
duobus corneis lateraliter instructum (fig. 14+); labium transversum (fig. 1 dt), lateribus in angulum productis, 
margine antico emarginato; lingua seu ligula e lobis duobus tenuissimis rotundatis formata; palpi labiales 
breves, tri-articulati, conici, scapo parvo basali transverso insidentes ; pronotum transversum, antice emargi- 
natum, postice sensim dilatatum, lateribus curvatis, versus angulos anticos longitudinaliter fossulatis (pro 
receptione antennarum), angulis posticis rotundatis, setis longis instructis ; sterna tria elevata, plana, cornea, 
sensim magnitudine decrescentia (haustellum maximum tri-articulatum simulantia), lateribus setis longis in- 
structa; epipleura inconspicua; pedes robusti, compressi, cursorii, spinosi (an saltatorii?), coxis magnis ; tarsi 
quinque-articulati, unguibus duobus robustis terminati ; ale antice elytriformes, coalite, angulis posticis rotundis, 
sutura recta; ale postice obsolete ; abdomen semi-ovale, planum, sex-articulatum, setosum., 
PLATYPSYLLUS CASTORINUS. 
Prats XXXVII, Fries. 1, 2. 
Luteo-fulvus, nitidus; capite punctis duobus (loco oculorum), marginum Jateralinm medium versus 
suleo profundo utrinque cum margine laterali parallelo, occipite postice sulco profundo sinuato, pectinato 
instructo; pronoto utrinque serie punctorum ex angulis anticis scutellum versus extensa, alteraque cum margine 
pronoti postico sinuato parallela; abdominis segmentis singulis linea submarginali spinarum plurimarum, ut in 
Pulice, supra et infra armatis; tarsis quatuor anticis maris setis clavatis membranaceis indutis. 
Long. corp. lin. 14=fere 4 mill. 
Habitat; parasitice in Castorem Canadensem. 
ORDER TRY SANUR A 
Famity—CAMPODEIDA. Westw. (CAMPODE. Meinert.) 
The following are the characters of this family as detailed by Dr. Meinert, of Copenhagen, in his Memoir 
in the Naturhistorisk Tidsskrift, 3rd Series, vol. iii. p. 403, Annals of Nat. Hist. 3rd Ser. vol. xx. p. 365 :-— 
Pedes cursorii, tarsis distinctis, elongatis biungulatis; corpus elongatum, abdomine distincte 10-articulato ; 
spiracula perspicua, saltem terna; abdominis lamine ventrales septem priores appendiculate ; cerci duo, e seg- 
mento decimo, ultimo, orientes; antenne setacesx vel filiformes. 
This family is composed of two genera only—CAMPODEA, Westw. Trans. Ent. Soe. vol. ii. p. 231; and 
TAPYX, Haliday, Trans. Linn. Soe. vol. xxiv. p. 441. The former is at once distinguished by having the body 
terminated by two long slender multiarticulated filiform appendages resembling a pair of anal antenne. The 
species of which it is composed are small and elongated like narrow Staphylini, but of a white or pale colour. 
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