36 ACARIDEA. 
narrow interspace ; at the end of the body there is a small triangular space between 
them. The spiracle is small, distinctly visible, and situated outside the hind coxe. 
The legs are without spines or teeth, and bear only some hairs and bristles, which at 
the top of the first pair of tarsi (and on the palpi) are long and more thickly set than 
on the other joints. The epistome is triangular and protrudes from under the anterior 
margin of the dorsal plate as anacute point; it imperfectly covers the mandibles, the 
branches of which are irregularly denticulated. 
Several specimens of this species, which is closely allied to the South-American 
C. subincisa, Berlese, were collected at Rio Hondo by M. Blancaneaux. 
2. Celenopsis megisthanoides, sp.n. (Tab. XIX. fig. 4, and Tab. XX. figg. 1, 
1 a, b, 2.) 
3 latet. 
2. Corpus ovatum, depressum, antice et postice declivum, postice subacuminatum, antice, propter epistomatis 
apicem, in angulum acutum desinens, lateribus in regione humerali sinuatis. Color clare badius. Scutum 
dorsuale integrum, antice truncatum, ejus margo in lateribus et in margine posteriore ; limbo angusto albido 
ab scutis ventralibus separatum, setis sat longis sparsis in superficie ornatum. Scutum sternale parvum, 
transversum, inter coxas primi paris situm, antice recte truncatum, lateribus et margine postico sinuatis. 
Scutum ventrale magnum, marginem posticum fere attingens, in eius parte anteriore vulva, rimam bifidam 
simulans, sita est. Pedes omnes setulis sparsis muniti fere inermes, exceptis femoribus quarti paris 
quee calcaribus tribus valde obtusis et seta valida basi approximata armata sunt, nec non tarso secundi 
paris qui ad apicem juxta unguium pedunculum dentem curvum exhibet. Pedes antici longi, graciles, 
ceteri crassiores, in eorum femorum dorso sete duz valide adsunt. Epistoma trigonum, declivum, antice 
acutum, ad eius basin in margine scuti dorsualis seta fortis in utroque latere adest. Corniculi labiales 
longe, ensiformes, extus recurvi, dentibus carentes. Inter eorum basin atque hypostoma processus spatu- 
liformis acutus transparens adest. Hypostoma in linguam longam, angustam, tripartitam desinens. 
Chelarum brachia longa, angusta, irregulariter denticulata, brachium mobile dentem fortiorem latum prope 
basin exhibens. Palpi setigeri, inermes. 
Long. 1°25 millim. ; lat. 0°75 millim. 
Hab. Panama, Bugaba (Champion). 
Male unknown. Body of the female ovate, depressed, somewhat acuminate behind, 
the lateral margin in the region of the shoulders somewhat sinuated ; anterior border 
of the dorsal plate truncate, bearing a strong bristle on each side over the basis of the 
epistome ; the lateral and hind margins of the dorsal plate show a narrow whitish 
border; the dorsal surface bears some comparatively long but thinly-set hairs. The 
sternal piece is small, its anterior margin truncate, the lateral and hind margins sinu- 
ated; it occupies the space between the first and second pairs of coxe. The ventral 
plate is large and almost reaches the hind margin of the body. The vulva is situated 
in the anterior portion of the ventral piece ; it forms a sort of bifid fissure. The fore 
legs are long and slender, the other legs shorter and thicker ; all of them are without 
spines or teeth, except the second pair, which bear a small curved tooth at their top, 
and the femora of the hind pair, which underneath bear a row of three somewhat blunt 
teeth ; between the base of the hind femora and the first of these teeth there is a 
