348, 



FIGURES 448-453. Oxyethira d is t i n ct ell a McL.: 



448 - head, thorax, legs and anterior end of case, dorsal; 449 - frontoclypeus; 

 450 - antenna; 451 - prothoracic sternites; 452 - left foreleg, outer view; 453 

 different stages in the construction of the case. 



4. Oxyethira ecornuta Morton 



Siltala, 1904b:30-31, 33, Figure 10, a-d.— Lestage, 1921:458-464. 



Full-grown larva. Length 3.1— 3.3 mm. Larvae light; sclerotized parts 

 light yellow; pattern little marked. No dark spots near the base of the 

 middle frontal setae of the frontoclypeus. Light dots in the posterior part 

 of the head; upper blade of left mandible with one tooth, lower blade with 

 2 teeth; right mandible with one blunt tooth lateral to the large terminal 

 tooth. Mesonotum and metanotum with black anterior angles and black 

 posterior margin; sides with a narrow dark border. Distal process of fore 

 tibia with a distinct crest of small, dark spinules; midlegs and hind legs 

 slightly darker than forelegs. 



Pupa. Length 2.6— 3.0mm. Presegmental and postsegmental plates 

 small, pale; presegmental plates with 3—6 denticles, postsegmental plates 



385 



