130 NEOTROPICAL PSELAPHIDAE 



of Eupsenius, the eyes are smaller, the posterior coxae are widely separated, 

 with the metasternum squarely truncate between them, uncovering the first 

 sternite which is short, not extending beyond the coxae, but really visible. 

 Among certain species of Eupsenius the first sternite is equally a little visible, 

 especially when the posterior coxae are more or less separated. The visibility 

 of the first sternite, coupled with the lack of a median longitudinal carina 

 on the ventral face of the head, renders the addition of this new genus very 

 embarrassing, and there is but little logic in placing Eupsenina in Tychini on 

 the basis of the visibility of the first sternite, but on the other hand, Eupsenina 

 resembles Eupsenius, where the latter's invisible first sternite (or nearly so) 

 places it in the Brachyglutini. It is impossible to isolate Eupsenius from 

 Eupsenina, each in a separate tribe since they resemble each other so much." 



There are three species in the genus Eupsenina at present; they may be 

 rapidly separated as follows: 



Second segment of the antennae spherical to ovate and simple 2 



Second segment of the antennae conspicuously, transversely triangular, 

 the mesial or internal face being produced and subacute, the lateral 



or external face simply convex patricia new species 



2. Second antennal segment ovate ; vertexal sulci arising from the vertexal 

 foveae short, not uniting with the frontal depression anteriorly be- 

 tween the bases of antennae fracticornis 



(1.1 mm.; described on female; meta- 

 sternum large and simply convex) 

 Second antennal segment spherical; vertexal sulci arising from the 

 vertexal foveae long, uniting with the frontal depression anteriorly 



between the bases of antennae sulcifrons 



(1.2 mm.; described on male; metasternum medianly foveate) 



Eupsenina patricia new species 



Type Male. Measurements: head 0.2 x 0.3 mm. through eyes; pronotum 

 0.28 X 0.26 mm.; elytra 0.43 x 0.49 mm.; abdomen 0.15 x 0.5 mm.; total length 

 1.06 X greatest width 0.5 mm. 



Uniform yellowish-brown, the integument highly polished and subglabrous. 

 Under high magnification the integument is minutely punctulate, with very 

 sparse, just perceptible setae (0.01 mm. long), these setae being about five per 

 one-tenth square millimeter. At lower magnification the integument appears 

 to be glabrous. 



Head subtriangular from a dorsal view if the eyes are not included. Eyes 

 large and prominent, being 0.087 mm. long, and composed of about 50 distinct 

 facets, subcircular from a lateral view, set in the anterior half of the head and 

 slightly longer than the tempora. Tempora 0.08 mm. subparallel, with rounded 

 posterior angles forming the subtruncate, inconspicuous occipital margin. 

 Vertex evenly, broadly convex with each side converging above the eye to form 

 a subacute, triangular extension between the bases of the antennae, and extend- 



