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202
Cerci mobiles, leviter sursum curvati, setacei, gracillimi,
stilo terminali annuli octavi duplo tenuiores eoque aliquantulum
breviores, spinulis brevissimis ciliisque Iongioribus natatoriis
sparsi.
Annulus analis evanidus. Apertura analis inter cercos
sita, valvulis duabus inclusa membranaceis, convexis, ad
Iongi-tudinem ductis, basi vicinis, medio dehiscentibus, apice
postremo clavate inflexo.
Pleuræ thoracis annulorumque abdominis septem priorum
breviter exsertæ, convexæ, membranaceæ, non scutatæ, annulo
octavo abdominis evanidæ. Yentralia abdominis scutis
ca-rentia, priora convexiuscula, posteriora convexa.
Spiracula thoracica in pieuris mesothoracis sita, rotundata,
minuta. Spiracula abdominalia in pieuris annulorum septem
priorum sita, rotundata, minutissima, æqualia. Apertura
spira-culorum omnium perminuta, rotundata.
Branchiæ ad basin coxarum fasciculate pendentes et in
ventralibus annulorum trium priorum abdominis transverse
seriatæ, tracheis omnino carentes, flliformes, teretes, hine
inde leviter constrictæ, apice acuminatæ, membrana
con-stantes tenuissima, pellucida, spissius transverse striata, ad
apicem versus levigata, coloris fuscestentis.
Larva fusiformis, latitudine maxima, ferme media
quin-tuplo longior, transverse fornicata, gibba, altitudine media
latitudineque media ferme æqualibus. Color flavus vel luteus.
Os fuscum. Caput scutaque dorsi corporis saturatius colorata,
fusco picta: caput macula clypei, macula minore utrinque
pone oculos vittisque duabus verticalibus, medio constrictis;
scuta omnia linea tenui circumscripta, ante et post in maculas
binas aut quaternas dilatata; pronotum maculis duabus magnis
dorsalibus, formå incomposita, plerumque biloba. Pictura fusca
magis minusve dilatata: dorsum totum interdum fuscum vel
fusce nigrum, vittis quinque macularibus luteis. Postterga
annulorum omnium fascia picta transversa, granulis pigmenti
nigri referta.
Victus aquaticus, rapax.
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