Sept., igog.] EwiNG : NeW AMERICAN OrIRATOIDEA. 125 



Abdomen oblong, two thirds as broad as long. Anal covers about twice as large 

 as genital covers, and situated almost approximate to the posterior margin of ventral 

 plate. Abdomen hairless. 



Anterior pair of legs extending about one third their length in front of the tip of 

 rostrum. Tibia and tarsus subequal. Ungues tridactyle. Legs clothed with many 

 rather small hairs. 



Length, 0.67 mm.; breadth, 0.43 mm. 



Under a stone. Collected by myself at Dunning, Illinois. One 

 specimen. 



LiacaruB magnilamellatus, new species. ( Plate IV, Fig. i8. ) 



Pale yellowish brown ; cephalothorax darker than the abdomen. 



Cephalothorax triangular, as broad as long. Lamellae very large and obscuring 

 much of the cephalothorax ; each lamella is of almost uniform width throughout its 

 length and the two fuse together at their anterior ends on the median line, so that no 

 true translaniella exists. Lamellar hairs straight, pectinate, about three fifths as long 

 as the lamellae ; interlamellar hairs similar to lamellar hairs but larger and slightly 

 curved. Pseudostigmatic organ with a long, slender, straight peduncle and a broad 

 lanceolate head. 



Abdomen oval, four fifths as broad as long. Genital covers shorter but broader 

 than the anal covers, situated about one and one third times their length in front of 

 the latter ; anal covers situated about one half their length from the posterior margin 

 of ventral plate. Dorsum of abdomen hairless. 



Anterior pair of legs almost as long as the abdomen. The hind pair of legs are 

 the stoutest. 



Length, 0.51 mm.; breadth, 0.37 mm. 



In rtibbish. Collected by C. R. Crosby at Columbia, Mo. A 



single specimen. 



Genus NOTASPIS Herm. 



Body smooth ; with lamellae ; legs inserted at the sides of the 

 body ; mandibles chelate. 



Key to Species. 



1. With translaniella 2. 



Without translamella 4. 



2. Anterior pair of legs extending fully one half their length beyond the tip of the 



rostrum 3 . 



Tarsus only of first pair of legs extending beyond the tip of the rostrum. 



A^. depilis sp. nov. 



3. Translamella fully as broad as lamella; Y. breviseiosa s^. nov. 



Translamella a mere line N. texana sp. nov. 



4. Pseudostigmatic organ with sub-capitate head ., iV. />a//it/a sp. nov. 



Pseudostigmatic organ with clavo-lanceolate head 5. 



5. Lamella veiy large, blade-like N. Idtnellata sp. nov. 



Lamella small, lateral, consisting of a chitinous ridge N. minuta sp. nov. 



