582 CLASS IX. 
oblong, divided into two parts; two anterior pairs of feet placed at 
the anterior part, remote from the two posterior, Ocelli two, sub- 
pedunculate. 
Sp. Zrombidiwm holosericewm Fasr., Acarus holosericeus L., Dr GEER Mém. 
vil. Pl. 8, figs. 12—18, Hermann. Mém. Aptér. Pl. 1. fig. 2, and Pl. 1. 
fig. 1, TREVIRANUS Verm. Schr.1. Tab. V. fig. 28; scarlet-red, felty, almost 
quadrangular; this little animal may be often seen, especially in spring, on 
the ground in gardens or in mosses on the stems of trees. 
Trombidium tinctortum Fasr., SLABBER Natuurk. Verlustig. Tab. 11., 
Hermann Mém. Aptérol. Pl. 1. fig. 1, DuméRIL Cons. gén. s.l. Ins. Pl. 55, 
fig. 4, from Guinea. 
The young individuals of different species live parasitically on insects. 
These are the six-footed Acarida, of which LATREILLE formed the genus 
Astoma (Gen. Crust. et Ins. I. p. 162). On Phalangium also such hexapod 
parasites are met with (Genus Zeptus Latr. 1. |. p. 161). 
Stigmeus Kocu. With ocelli indistinct. 
Lrythreus Later. (Rhyncholophus Ducks, Kocu, Erythreus 
Ducks, Kocn). 
Note.—Body undivided. Four posterior feet not very remote from 
anterior. Other characters almost of Trombidium. 
On some other divisions see Kocu Uebersicht, 111. 2, pp. 41—60. Here 
also is to be referred genus Tetranchus DuFourR (Ann. des Sc. nat. XXV. 
1832, pp. 276—283), to which division belong Trombidium telarium, T. 
tiliarum, 7’. Socitwum HERM., and other minute species of Acari, forming 
fine close webs that invest and suffocate shrubs and trees. 
OrveR IV. Phalangita. 
Cephalothorax conjoined with abdomen. Abdomen ringed or 
transversely folded. Palps filiform. 
Family X. Phalangita. (Characters of the order those of the 
single family). Mandibles didactylous, mostly exsert. Feet elon- 
gate, terminated by a single claw. 
Trogulus Later. Cephalothorax produced anteriorly into a 
clypeus, covering the organs of the mouth. Ocelli two at the base 
of clypeus. alps filiform, not unguiculate at the apex. Tarsi not 
elongate, with three joints. Body elongate, depressed. 
Sp. TZrogulus nepeformis Latr., Gener. Crust. et Ins. Tab. vi. fig. 1, GUERIN 
Iconogr., Ins. Pl. 4, fig. 6. To this genus belongs also Phalangiwm tricari- 
natum L. and Fasr., but is, according to Kocn, a different species from 
