European Trichoptera. 297 



specimens; maxillary palpi very large and greatly 

 dilated, standing out distant from the face, and not 

 masking it as in other species of the genus, pale yellow, 

 thinly clothed externally with blackish hairs ; labial palpi 

 shorter than in other species, the middle joint broader 

 than the others, brown. Prothorax with golden-brown 

 hairs. Anterior wings obtuse, obscure golden-brown, 

 with an appearance of longitudinal yellowish streaks, 

 whereof that in the sub-costal area is the most conspi- 

 cuous ; apical fringes black with a pale interruption near 

 the anal angle : posterior wings smoky blackish, with 

 blackish gray fringes. Legs all yellow, the femora some- 

 what dingy, the posterior tibiae and tarsi brighter than 

 the others. 



Anal appendices reddish : app. sup. dilated and strongly 

 fringed ; app. inf. very strongly dilated, the superior 

 portion above the notch very much the larger ; app. in- 

 termed, broad, deeply furcate, the prongs curved up- 

 wards and the lower much longer and broader than the 

 upper ; penis shining testaceous, long, the apex notched 

 above, pointed beneath ; sheaths cylindrical, slightly 

 bent, the tips thickened and curved inwards; ventral 

 triangle broad and very obtuse, the margins slightly 

 sinuate ( ^ ) . 



Expanse of wings IT". 



Switzerland, on the Aar [Eaton) . 



I have only one male of this species, which in the 

 form of the maxillary palpi diflers from all others, these 

 organs being widely separated from the face and greatly 

 dilated, whereas they, as a rule, lie closely pressed against 

 the front, and mask the face ; the form of the app. in- 

 termed, is also very different from any other species with 

 which I am acquainted. 



Genus Oligoplectbum. 



I propose this name for Eambur's genus Dasystoma, 

 which name was previously applied to Curtis to a genus 

 of Lepidoptera. 



Oligoplectbum moeosum, n. sp. 



Almost entirely black ; the fore-ivings clothed with 

 thick blackish-brown pubescence ; the radius without a 

 bend ; transverse veinlet uniting the ramus thyrifer and 

 ramus discoidalis, placed almost level with that closing the 



