32 ACARIDEA. 
femorum dorso spinas simulant. Cuticula ad earum basin in dentis formam paullulum protrusa. 
Femora quarti paris supra tuberculis quatuor «quidistantibus munita sunt, ex quibus sete fortes spini- 
formes nascuntur ; subtus apicem versus dentes tres fortes gerunt. Cetera articula setis sparsis munita, 
ex quibus una ad apicem articuli quarti, altera ad apicem quinti articuli longiores sunt. Epistoma 
magnum, triangulare, supra transverse compressum, antice paullo deflexum, apice in angulum acutum 
paullo producto, eandem texturam microscopicam exhibens quam scuta ventralia. Ab animalculo vivo 
epistoma ad latera nec non sursum deorsumque capitis instar movetur. Palpi longi, teneri, setis sparsis 
quee in apice sexti articuli magis numerose sunt, muniti. Hypostoma in utroque latere dentem apice 
obtuso ostendit, in medio in lingulam longam, angustam, quadrilobatam, setulosam, pellucidam, desinit. 
Mandibule fortes, earum chela longa, angusta, brachiis ambobus denticulatis ; in brachio fixo circa 12, 
in mobili circa 14 dentes observavi. Chele brachium fixum in superficie interna scopa pellucida setulosa 
superatur que ex chela media nasci videtur ; apex brachii mobilis membranula tenuissima, hyalina, con- 
voluta (mappula apud Thorell) ornatur, cujus margo subtilissime serrulatus est. In superficie laterali 
brachii chele mobilis arbusculi tres racemosi nascuntur, quorum duo sub apice brachii siti, et valde 
inter sese approximati sunt, tertius paullo distans, in medio chele fere situs. Ad basin externam brachii 
mobilis fasciculus ex spinulis hyalinis confectus difficillime observatur. Dentes labiales longi, curvi, 
integri. 
Long. corp. cum epistom. 3°5 millim., sine epistom. 3 millim.; lat. max. 2—2°25 millim. 
@. Corpus ovatum, antice truncatum, supra convexulum. Scutum dorsuale integrum, modice nitidum ob 
foveolas impressas, ex quibus setule breves, suberecte nascuntur, oblique retrospicientes. Limbo albido 
ad latera et postice a scutis ventralibus separatur. Color lete brunneus. In utroque latere prope mar- 
ginem scuti dorsualis series setarum longarum inserta est. Textura microscopica e sulculis anastomosan- 
tibus confecta, qui scutum totum areolis oblongis irregulariter reticulant, sicut in maris scutis ventralibus. 
Venter in medio convexus, lateribus in coxarum regione depresso-concavis. Scutum sternale angustum, 
antice et postice rectum, lateribus ob coxarum insertionem sinuatis, a scutis lateralibus interstitio angusto, 
a scuto anali interstitio lato albicanti discretum. Inter coxas secundi atque tertii pedum paris orificium 
genitale situm est, magnum, subpentagonum, margine postico inerassato. Scutum anale margine antico 
recto, lateribus atque margine postico rotundatis, orificium anale in medio situm. Scuta lateralia coxifera 
ab anali interstitio albido lato separata, postice angulatius protracta, apice rotundata. Epistoma, palpi 
et pedes sicut in mare. Hypostoma in medio in lingulam quadrilobatam hyalinam productum, dentibus 
lateralibus, qui in mare adsunt, carens; sulculo laterali sinuato, qui palporum socculum a labii trunco 
separat. Palpi labiales longi, graciles, apice acuto, curvo, margine interno dente uno seu duobus. Man- 
dibule sicut in mare, excepto brachio mobili chele, qui numerum minorem dentium prebet. 
Long. cum epistom. 2°5 millim.; lat. max. 1:25 millim. 
Hab. GuatEMaLA, Aceituno, Guatemala city, Zapote (Champion), Retalhuleu (Stot 
In regione “ Cholhuitz,” hanc speciem in coleoptero-pectinicorni “Proculo goryi” deno- 
minato parasitam inveni. 
é. Body longer than broad, rounded behind, truncate at its anterior margin, much 
depressed, smooth and shining; a few hairs are placed near the anterior margin, and a 
row of six or seven obliquely inserted long bristles adorn the hind margin on each 
side; colour light reddish-brown, in some individuals darker than in others; the 
dorsal plate is separated from the ventral pieces by a whitish border on its side- and 
hind-margins, and shows a minute sculpture consisting of small, irregularly polygonal 
are with a few impressed points between them; ventral surface convex in the middle, 
depressed at the sides, smooth, its border whitish and very narrow. Sternal plate 
narrow ; rather long, smooth; its anterior margin truncate, its hind margin rounded. 
Genital orifice situated between the coxe of the 2nd and 3rd pairs of legs, small, 
circular. The sternal plate has two grooves at the hind margin, one on each side, out 
