4 ACARIDEA. 
5. Trombidium guayavicola, sp.n. (Tab. II. figg. 2-2.) 
Corpus oblongum, tomentosulum; nigrum, maculis duabus albis: anteriori in medio dorso sita semilunari, 
impari, posteriori anali, triangulari. Oculi rubri. Pedes ochraceo-rufescentes ; par primum et quartum 
secundo atque tertio longiora, crassiora ; tarsorum ungues valde recurvi, ad basin serratuli. Palporum 
articuli cylindrici; appendicula brevis, recta, apice rotundata. Mandibulew ? 
Long. 1, pebibus extensis 4, lat. 0°5 millim. 
Hab. Guatemata, Retalhuleu (Stol/). 
Body oblong; velvety-black, with two large white spots—a semilunar one on the 
dorsum between the coxe of the third pair of legs, and a triangular one at the posterior 
margin of the body. Eyes red; the palpi and legs of a clear reddish-brown colour. 
The first and fourth pairs of legs longer and thicker than the second and third pairs ; 
front tarsi spindle-shaped ; claws of the tarsi strongly curvate, with some indentations 
at the basis of their concave edge. Palpi straight, slender, with almost cylindrical 
joints; the fourth joint with a short claw, and a short, straight appendicula, the 
latter rounded, very broadly inserted, and bearing several long hairs on the top. The 
fourth pair of tarsi bear a sort of brush beneath, formed of long, oblique, slightly 
pinnate hairs; these hairs do not fall off so easily as from the other tarsi, and undoubt- 
edly help the animal in running up the trees. 
This species is not rare in the forests near Retalhuleu, where it is to be found running 
up and down the smooth trunks of the guayava trees (palo volador). 
6. Trombidium trilineatum, sp. n. (Tab. I. figg. 2-2 ¢.) 
Corpus oblongum, postice rotundato-truncatum, depressiusculum, coccineum, tomentosulum, hirsutie brevi, 
canescenti; pseudo-prothorax albescens, sulco profundo transverso post oculos ab abdomine separatus ; 
dorsum abdominis hirsutie albescenti, per sulcos duo longitudinales, laterales, parallelos, serpentes in partes 
tres distinctas separatum. Pedes, palpi et mandibule rufescentes. Palpi elongati; tertio articulo 
cylindrico; appendicula brevi, basi lata inserta, apice rotundata. 
Long. 1:25, lat. 0°75 millim. 
Hab. Guatrmaa, Antigua (Stoll). 
Body oblong, with almost parallel sides; the dorsal surface divided into a pseudo- 
prothorax and an abdomen by a deep transverse furrow, from which two lateral lon- 
gitudinal furrows take their origin; these latter divide the back of the abdomen 
into three separate, whitish aree. Legs long, slender, reddish-brown.  Palpi 
slender, clothed with long, stiff, dispersed hairs; their third joint long, almost 
cylindrical; the appendicula short, rounded at its end, and with a few stiff hairs on the 
top. 
This species lives in the hedges and gardens of the valleys of Antigua and Guatemala 
city. It is commonly found on the leaves of bushes, where it seems to feed on Aphides. 
When the specimens, by rubbing themselves against the leaves, &c., begin to lose their 
whitish velvety pile, their colour appears much redder than in the specimen figured. 
t 
