2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.68 



the fact that Doctor Bassler's excellent photographs make them 

 readily recognizable. For ready reference the following table of 

 beetle elytra may be serviceable: 



Surface without striae or punctures Tenebrionites inclinans 



Surface with striae but no punctures Carabid (?) species uncertain. 



Surface with rows of punctures 1 



1. Length 2.6 mm Curculionites jujuyensis 



Length 4 mm. or over 2 



2. Long and parallel-sided, the width not quite one-third of length 



Cossonus (?) devoratus 

 Shorter or broader, the width much more than a third of length 3 



3. Large and black, width 3 mm., punctures very strong _Otiorhynchites aterrimus 

 Smaller or more slender, width not over 2.5 mm 4 



4. Slender, width less than 2 mm.; inner margin with a strong double curve 



Curculionites wielandi 

 More robust, width over 2 mm 5 



5. Apical region broad, apex very obtuse Curculionites harringtoni 



Apical region narrowed, apex narrower Anthonomus (?) sunchalensis 



It will be seen that six of the seven described species are consid- 

 ered to be weevils. 



TRICHOPTERA 



The small specimen described below appears to represent a family 

 (Molannidae) new to South America, but it is so imperfect that its 

 generic position remains in doubt. 



MOLANNA (7) DEROSA, new species 



Anterior wing; length as preserved 4 mm., probable total length 5 

 mm. ; shape of wing about as usual in the genus; as preserved it is color- 

 less, with the venation pale brown. It 



~~7 '""_____ is not possible to see all the details, but 



^~ J ~3I3III1-^—'"^ most of what is visible agrees quite 



'^''^^~-~-'=:mil___ closely with the male of the European 



M. angustata Curtis. The apparently 



reduced and simple condition of the 

 radius, the only moderately oblique 

 Fig. i.-MoLANNA derosa. anteuior ^^id of the ccll between the radius and 

 ^™° its sector, the r.-m. cross-vein only just 



beyond the end of the radial cell, and the media with two straight 

 branches above, reaching edge of wing above the apex, are all Molanna 

 characters. Below this it is only possible to see part of an apparently 

 simple vein, then a fork and then part of another simple vein. In 

 principle this is not very different from the condition in some species 

 of Molannodes. In view of the imperfection of the specimen and the 

 extreme differences in venation known to exist in this group, espe- 

 cially when the living and amber (Oligocene) species are compared, 

 there is no basis for proposing a new generic name. 



