286 Mr. T. D. A. Cockerell — Descriptions and 



Trigona townsendi, sp. n. 



Worker : about 2\ mm. loug. 



Compact, Avith short abdomen, black, nearly hairless ; 

 scape slender, ferruginous, dusky at apex, flagellum dark ; 

 niaudil)les rufous ; face broad and flat ; head and mesothorax 

 dullish, finely sculptured; antennae close together, a keel 

 extends upwards from their base, changing to a groove ou 

 upper part of front ; cheeks, metathorax, and pleura 

 shining; tegulae testaceous. "Wings hyaline, with pallid 

 nervures ; stigma large, narrowly margined with dusky. Legs 

 very dark fuscous, small joints of tarsi ferruginous ; posterior 

 tibiae moderately broad. Abdomen smooth and exceedingly 

 shiny. The following characters are seen with the com- 

 pound microscope : mandibles edentate ; malar space well 

 developed, about 104 fju long ; distance between antennal 

 sockets hardly 100 /i ; front with a minutely cancellate 

 sculpture; mesothorax very minutely cancellate, except at 

 sides, where this sculpture gives way to coarse ridges 

 directed toward the margin ; scutellum more feebly sub- 

 cancellate, the tendency being towai'd transverse markings ; 

 metathorax inflated, delicately cancellate, the well-defined 

 polygonal areas about twice as large as those on mesothorax ; 

 width of hind tibia about 270 /i ; last antennal joint 

 flattened and curved, rather spoon-like. 



Hub. Piura, Peru, October (C. H. T. Townsend, 124). 

 Resembles T. schulthessi, Friese, from Guatemala, but is 

 smaller, with the thorax partly shining, T. muelleri, Friese, 

 and T. dutrcB, Friese, are easily separated by the shining 

 head and thorax ; and T. schrottkyi, Friese, by its white- 

 haired face and absence of a distinct malar space. 

 T. fraissei, Friese, is much more hairy. 



Xylocopa nitidiventris, Smith. 



X. mormvitzi, Perez, 1901, is a synonym, according to a 

 note pencilled by Professor Perez on my copy of his 

 description. 



Xylocupa variuns incarum, subsp. u. 



? . — Similar to X. various ecuadorica, Ckll., but diftcring 

 as follows : scattered pale liairs of abdomen white (not 

 golden) ; extreme sides of segments 2 to 1 with narrow but 

 dense white apical hair-bands; the pale yellowish hair of 

 legs of ecuadorica wholly replaced by hair of a fine deep 

 copper-red. Teguhe black, slightly reddish posteriorly. 



