THE ACARIXA OR MITES. 



81 



The species of Iphiopsis (fig. 152) have short, stout legs, not very bristly; they have 

 been found on myriapods; two species from Java were considered as forming a new 

 subgenus Jacohsonia {Greeniella Berl. non Bks., non Ckll.)- Their relations to the 



I 



0—0' 



Fig. 153.— Afacrocheles carcUncnsis: Female. 

 (Author's illustration.) 



Fig. 154.—Macroc]ulcs caroli- 

 ncTisis: Venter of female. 

 (Author's illustration.) 



mjTiapods are unknown, but they probably secure food from the host. One speciea 

 occurs in Florida. Hyletastes (figs. 165, 166) includes rather small, short-bodied species, 

 most of which have been found on scarabseid 

 beetles, but a few in moss. Those forms having 

 long bristles around the margin of the body have 

 been called a new genus, CopripMs. In the Tropics 

 are many species of this genus, often found at- 

 tached to scarabaeid beetles; Berlese has divided 

 it into several genera. 



Macrochdes (figs. 153, 154, 155) includes some of 

 our most common species, but few have been de- 

 scribed; one (M. moestus Banks) occurs in the 

 nest of an ant, Lasius americanus. Others are 

 found attached to insects, some are found on flies, 

 but nearly all normally breed in manure or de- 

 cajdng matter. Most of the species are of large 

 size. M. badius Koch, an European species, is found attached to flies bred from 

 manure. Holotaspella is a subgenus of Macrochdes for species with a sculptured 

 dorsum. Sejus (fig. 157) is a remarkable form, found in the northern part of this 



Fig. Ibb.—MacToclielcs spinatus: Legs II 

 and IV of male. (Author's illustra- 

 tion.) 



