1917] Sy?topsis of Beetle Mites 121 



gg. Pteromorphas rudimentary, shelf-like Neoribatula n. gen. 



[Type: N. brevisetosa (Ewing)] 

 ff. Translamella absent, but lamellae sometimes joined by a line (not 

 by a ridge). 

 g. Tarsal claws monodactyle. 



h. Integument rough, or pitted Tegeozetes Berlese, 1913 



[Type: T. tunicatus Berlese] 



hh. Integument smooth Oribatodes Banks, 1895 



[Type: 0. mirabilis Banks] 

 gg. Tarsal claws tridactyle. 

 h. Pteromorphae rudimentary, or shelf-like, Oributula Berlese, 1896 



[Type: 0. tibialis (Nicolet)] 

 hh. Pteromorphae not rudimentary. 



i. Integument of dorsum smooth Ceratozetes Berlese, 1908 



[Type: Oribates gracilis Michael] 

 ii. Integument rough, reticulate, or pitted. 



j. No hairs on abdomen Trachyoribates Berlese, 1908 



[Type: Oribates ampulla Berlese] 



jj. Conspicuous hairs on abdomen. . .Peloribates Berlese, 1908 



[Type: Oribates peloptoides Berlese] 



ee. Lamellae attached to cephalothorax at their bases only, very large. 



f. Lamellae entirely free from each other Oribatella Banks, 1895 



[Type: 0. 4-dentata Banks] 

 ff. Lamellae united or joined together for much of their length, 



Joelia Oudemans, 1906 

 [Type: Oribates fiorii Coggi] 



Family Nothrin^. 



Subfamily SerrariincE has but one Genus Serrarius Michael, 1883 



[Type: 5. microcephalus (Nicolet)] 



Subfamily Zetorchestince has but one Genus Zetorchestes Berlese, 1888 



[Type: Z. micronychus (Berlese)] 



Key to the Genera of Subfamily Notaspidince. 



a. Legs inserted well under the body; abdomen strongly arched, 



Liacarus^ Michael, 1898 



[Type: L. simile (Nicolet)] 



aa. Legs inserted at the edges of the body; abdomen not so strongly arched. 



b. Lamellae seldom more than half as long as the cephalothorax and being low 



blade-like, or ridge-like structures. 



c. Lamellae placed well toward the median plane and running together in 



front Cultroribula Berlese, 1908 



[Type: Notaspis jiincta MichaeP] 



cc. Lamellae, which may be vestigial, placed more laterally, not running 



together in front, although they may be connected with a translamella, 



Lucoppia Berlese, 1908 

 [Type: Zetes lucorum Koch] 

 bb. Lamellae very long and narrow, about as long as the cephalothorax, lance- 

 like and provided with cusps in front. 

 c. Lamellae attached to cephalothorax for the.ir whole length, except for the 

 small cusp; abdomen somewhat truncate in front, Conoppia Berlese, 1908 



[Type: Oppia microptera Berlese] 

 cc. Lamellae attached to cephalothorax for about one-half their length; 



abdomen circular Notaspis Hermann, 1804 



[Type: N. bipilis^ Hermann] 



'' = Liosoma, which name was foimd to be preoccupied by Michael. 



*This species was suggested by Michael in his "British Oribatidae" as the 

 type of Notaspis Hermann, but the type of Notaspis Hermann, was fixed by Nicolet 

 in 1854, hence Zetes lucorum Koch is available as a type for Lucoppia Berlese. 



^Not Zetes lucorum Koch. 



