158 AMERICAN HYMENOPTERA. 



EUGLOSSID^. 

 Englossa cordata Linn. 



Guapiles, March, June. Taken making nests between the boards 

 of the roofing. From Pozo Azul (June 15th, Carriker), from a 

 nest on the under side of a leaf one 9 that is entirely reddish cop 

 pery, with green reflections in certain lights ; legs more green. 

 Except for the color this specimen agrees perfectly with typical 

 cordata, and is only a color variety. 



Eiiglossa bicolor Ducke. 



One 9 from Pozo Azul (May 20, 1902, Carriker), having the 

 vertex and thorax above, first and second abdominal segments deep 

 violaceous, rest of insect all green. 



Euleina mexicaua var. conuexa Friese. 

 One 9 at Guapiles (March). 



Euleina fasciata Lep. 



Pozo Azul, June (Carriker) ; Guapiles, March ; San Jose, all 9 9 . 



Centris nitida Sm. 



San Jose, in May and June, 4 9 • 



Centris difforinis Sm. 



Pozo Azul, June 15th (Carriker), one 9 • 



Centris Friesei n. sp. 9- — Head and thorax black, abdomen and venter 

 red ; mandibles, except tips, labrum, except anterior border and a basal medial 

 spot, a transverse spot on each side of clypeus which is inclined slightly upward 

 toward the middle, anterior and intermediate knees and narrow anterior orbits 

 as high as insertion of antennae, yellow; labrum coarsely punctured, twice as 

 wide as long, fringed with yellow hair; clypeus wider than long, very sparsely 

 and finely punctured, concave on the apical half, the anterior border raised into 

 a carina, which laterally terminates in a slight elevation ; basally two large but 

 not very apparent elevations on the clypeus; inner side of mandibles with a 

 large tooth near apex and a small sharp projection medially ; pubescence of head, 

 thorax and pleura olive-grey, composed of dirty whitish hairs, each tipped with 

 black; pubescence of cheeks white ; fiagellum ferruginous beneath; mesothorax 

 closely punctured, scutellum sparsely so ; wings very dark, splendidly iridescent ; 

 legs black, posterior pair reddish behind; pubescence of anterior pair light ; of 

 intermediate tibise reddish golden, the tarsi with blackish brown, fringed with 

 reddish; of posterior pair reddish golden, rufous internally and on tarsi and 

 darker at apex of tarsi ; abdomen finely and sparsely punctured, with olive-grey 

 pubescence on first segment, and on apical segments reddish golden. Length 20 

 mm. ; width 7 mm. 



