50 A. e. OUDEMANS, NOTES ON ACARI, 



of Pso7'optmae, whilst the adults have those of Pterotiyssus, 

 though they resemble Mi'gninia, I think it is necessary to 

 form a new subfamily of Psoralginae. I think they are desti- 

 tute of vertical hairs. 



Of the Canestriniiaae only the genus Canestrinia is provided 

 with a pair of vertical hairs. The genus Dermolichus i) {Coleop- 

 terophagiis) is so closely allied to Canestrinia^ that 1 believe 

 carefull examination will prove the presence of a pair of 

 vertical hairs. These two genera are mox*eover provided with 

 a soft, smooth, unwrinkled skin, chelate mandibles, two-joiuted 

 palps, ambulacra, with caruncle and one claw, and 5-jointed 

 legs, so that I propose to unite them with the 'Tyroglyplddae. 

 The only reason that the group of Canestriniinae was erected, 

 is that the creatures parasite on insects ! — But what to say of 

 Linobia ? This creature, which I know not by own examination, 

 has a dorsal shield, legs of 5 joints, palps of 2 joints, ambu- 

 lacra only with caruncle, without claw ; I know not if the 

 remaining skin be wrinkled, but the creature resembles the 

 Pterolicheae in all respects, except that it has sawlike mandi- 

 bles, not chelate ones. So I will erect for it a new subfamily, 

 which I will call Linobiinae. — And what to say of Hemisarco- 

 coptes f Its skin is smootii. not wrinkled ; its legs end in two 

 claws (read clawlike hairs) like those of the Sarcocoptidae, 

 but the real ambulacra consist only of a pedunculate sucker, 

 etc. Apparently no vertical hairs ! I will erect for it a new 

 subfamily, which I will call Hemisarcocoptinae. 



Of the Listrophorinae at all events the genera Listrophorus, 

 Myocoptes^ Criniscanso?' and CIdrodiscus are provided with vertical 

 hairs, though sometimes minute ones. I could not detect 

 vertical hairs in the descriptions and drawings of Trichoecius, 

 Schizocarpiis, Campylochirns and Labidocarpus, but I think 

 carefull examination will detect them. The genus Acotylopus 



1) Dermaleichus C. L. Koch 1841. Deu. Cr. Myr. Ar., Heft 3.3, No. 4, with 

 U. chri/soineiiiius as type Nut mentiuned iu „Dus Tierreich." 



