NEW AND LITTLE KNOWN BEES. 115 



shining, hardly punctured hind margin of first abdominal segment. 

 There are three submarginal cells. 



Hab. Falfurrias, Texas, on Helianthus, May 18th, 1907 

 (A. C. Morgan). 



Exomalopsis frederici, sp. nov. 



<? . Length about Q^ mm., expanse 16 ; black, mandibles dark 

 red except at base, tibiae at apex, and the tarsi ferruginous ; hair of 

 head and thorax long and abundant, shining white on face, cheeks 

 and under side of thorax, fulvous on head and thorax above, very 

 bright on anterior half of mesothorax ; flagellum obscure brown 

 beneath ; vertex shining ; ocelli large, in a scarcely curved line ; 

 mesothorax closely and distinctly punctured, except on disc posteriorly, 

 where it is shining and sparsely punctured ; base of metathorax with 

 strong punctures and small shining spaces ; tegulae bright reddish- 

 amber ; wings clear, dusky at apex, stigma and nervures clear amber- 

 colour; stigma large; b. n. going far basad of t. m. ; second s. m. 

 broad, receiving lirst r. n. far beyond middle ; legs with pale hair, 

 fulvous on inner side of tarsi, middle and hind tibiae with dark fuscous 

 hair on outer side ; hind tibiae thick, but legs otherwise ordinary ; 

 abdomen shining, very finely punctured ; hind margins of second and 

 following segments with entire pale fulvous hair-bands, that on 

 second narrow and submarginal ; segments before the bands with fine 

 short hair, only clearly seen in side view, that on second ochreous, 

 on the others black ; apex of abdomen broadly rounded, ferruginous. 



Hab. Mexico (F. Smith coll., 79, 22). British Museum. In 

 Friese's table of Exomalopsis this runs to E. planiceps, Sm., 

 which differs conspicuously in the colour of the pubescence. 



The insect looks rather like a small Diadasia. The hind 

 spur is strongly curved at end. 



Coelioxys ardescens^ Cockerell. 

 Guayaquil, Ecuador, one male, one female (v. Buchwald ; 

 Alfken coll. 6). These are quite identical with the Brazilian 

 C. ardescens. The female, not before known, is about 13 mm. 

 long, and resembles the male except in the usual sexual 

 characters. The last dorsal segment of abdomen is keeled, 

 and ends obtusely ; the last ventral is rather broad, and is 

 narrowed, but not distinctly notched, before the end. The 

 insect reminds one of C. otomita, Cress., from which it differs 

 especially as follows : — Eidge between antennse high, extending 

 down to clypeus, which is obtusely elevated in the middle (the 

 lower edge of clypeus is shallowly emarginate) ; middle of 

 mesothorax with sparser and smaller punctures; middle of 

 apical margin of clypeus much less angulate ; last dorsal 

 segment much broader apically ; last ventral broader, and 

 rather abruptly narrowed before the end. In Schrottky's table 

 of Brazilian species this female runs to C. pygidialis, Schrottky, 

 but differs from it by the absence of a median tooth on scutellum 

 and a ventral keel on abdomen. 



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