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. Trombidium holosericeum FABK., Acarus holosericeus L., DE GEER Mtm. 

 vii. PI. 8, figs. 12 18, HERMANN Mem. Apter. PI. I. fig. 2, and PL n. 

 fig. i, TREVIRANUS Verm. Schr. I. 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 tinctorium FABR., SLABBER Natuurk. Verlustig. Tab. n., 

 HERMANN Mem. Apterol. PI. i. fig. i, DUMERIL Cons. gen. s. 1. Ins. PI. 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 Leptus LATR. 1. 1. p. 161). 



Stigmceus KOCH. With ocelli indistinct. 



Erythrceus LATR. (Rhymholophus DUGES, KOCH, Ery throws 

 DUGES, KOCH). 



Note. Body undivided. Four posterior feet not very remote from 

 anterior. Other characters almost of Trombidium. 



On some other divisions see KOCH Uebersicht, ill. 2, pp. '41 60. Here 

 also is to be referred genus Tetranchus DUFOUR (Ann. des Sc. not. xxv. 

 1832, pp. i>]6- 283), to which division belong Trombidium telarium, T. 

 tiliarum, T. Socium HERM., and other minute species of Acari, forming 

 fine close webs that invest and suffocate shrubs and trees. 



ORDER IV. Phalaritjita. 



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 LATR. Cephalothorax produced anteriorly into a 

 clypeus, covering the organs of the mouth. Ocelli two at the base 

 of clypeus. Palps filiform, not unguiculate at the apex. Tarsi not 

 elongate, with three joints. Body elongate, depressed. 



Sp. Trogulus nepceformis LATR., Gener. Crust, et Ins. Tab. vi. fig. i, GUERIN 

 Iconogr., Ins. PL 4, fig. 6. To this genus belongs also Phalangium tricari- 

 natum L. and FABR., but is, according to KOCH, a different species from 



