341 



4 (5). Upper blade of right mandible with 2 large teeth; lower blade with 



one tooth; thorax mainly light yellow 



1. Ox. costalis Curt. (p. 376) 



5 (4). Upperbladeof right mandible with 3 teeth; lower blade with 2 small 



teeth; there is also one tooth near the blunt distal end of the mandible; 

 thorax mainly brownish 2. Ox. sagittifera Ris. (p. 383) 



6 (3). Seta of antenna on the sensilla, a third of its length from the distal 



end 3. Ox. distinctella McL. (p. 384) 



7 (2). Dark spots at the base of the middle dorsal setae absent; head 



light yellow; upper blade of left mandible with one large, blunt 



tooth; lower blade with 2 blunt teeth 



4. Ox. ecornuta Mort. (p. 385) 



8 (l). Distal process of foretibia with a few light spinules on outer side. 



9 (10). Head and thorax brown, with light spots in some places; 2 teeth 



of the upper blade of the left mandible are larger than the others; 

 lower blade with several small teeth .... 5. Ox. frici Klap. (p. 386) 

 10 (9). Head and thorax lighter; teeth of left mandible of the same size. . 



6. Ox.tristella Klap. (p. 386) 



Pupa 



1 (8). Broad end of case with one disk at each angle. 



2 (3). Labrum broadly rounded; anterior angles indistinctly marked; 



sides of broad end of case slightly concave; neck of case 

 moderately long 1. Ox. costalis Curt. (p. 376) 



3 (2). Labrum with rounded, distinct anterior angles; sides of broad end 



of case almost parallel. 



4 (7). Neck of case slightly broadening near the opening. 



5 (6). Presegmental plates of abdomen with 4—8 hooks; postsegmental 



plates with 3—5 hooks 2. Ox. sagittifera Ris. (p. 383) 



6 (5). Presegmental plates with 3—6 hooks; postsegmental plates with 



9-11 hooks 4. Ox. ecornuta Mort. (p. 385) 



7 (4). Neck of case absent 3. Ox. distinctella McL. (p. 384) 



8 (l). Angles of anterior end of case with two disks. 



9 (l0). Anterior margin of case strongly convex; plug of neck of case 



projecting, hemispherical 5. Ox. frici Klap. (p. 386) 



10 (9). Anterior margin of case straight or slightly convex; plug of neck 



of case not projecting 6. Ox.tristella Klap. (p. 386) 



1. Oxyethira costalis Curtis 



McLachlan, 1886:17.- Morton, 1887: 201.- Miiller, Fr., 1887:337-340.- 

 Klapalek, 1890:204-208, Plate IX, Figures 1—11; 1890:204-208, Plate 9.- 

 Struck, 1900:Plate VI.- Ulmer, 1903:133, Plate III, Figure 73.- Siltala, 

 1904b:31-33.- Thienemann, 1905b:547, Figure 102.- Ulmer, 1909:226, 293, 

 Figures 348a, 428.- Lestage, 1921:458-463. - Nielsen, 1948:76-95, 

 Figures 2, B, 3, C, 4, C, 6, G, 7, C, 26-33, 52, B, 53, 54-62, B, C, 

 Plate III, Figure 23, 24. - Lepneva, 1940:202. 



376 



