258 ENTOMOLOGICAL NEWS. [Sept., '06 



above, and moreover flies in the fall while intermixtus is a 

 vernal species. I dedicate this species to Mr. J. C. Crawford, 

 from whom the type was received, in recognition of his most 

 meritorious work on our bees. Type in author's collection. 



Collates lacustris n. sp. 



9 Length 9 mm. Clypeus shining, long and prominent, flattened but 

 not silicate, its punctures coarse but widely separated and not at all sfri- 

 ate, the suhapical transverse depression very deep. Supraclypeal area 

 shining, coarsely punctured. Face roughened by excessively small can- 

 cellate punctures, dull, its pubescence short, sparse and pale. Sides of 

 vertex densely, finely, indistinctly punctured, the interocellar tuft and 

 occipital fringe sparse, black, with some pale hairs intermixed. . Cheeks 

 with sparse, shallow punctures and short, thin, white hair. Antennae 

 short, black, joint 3 longer than 4, flagellar joints about as long as wide. 

 Malar space about as long as wide. Prothoracic spine very short, blunt. 

 Punctures of mesothorax fairly large, rounded and distinct, very close 

 along anterior margin, medially and posteriorly widely separated and less 

 distinct on a shining surface, this shading further into a large polished 

 impunctate spot on the disk. Mesopleura with distinct well separated 

 punctures. Scutellum with a wide basal polished impunctate space fol- 

 lowed by a densely, striately, shallowly punctured surface. Postscutellum 

 minutely roughened, opaque. Superior face of metathorax poorly de- 

 fined, its pits rather irregular, longer than broad. Enclosure funnel 

 shaped, the bowl coarsely irregularly rugose, the neck concave, smooth 

 and somewhat shining. Sides of posterior face subopaque, densely shal- 

 lowly rugose, tuberculate. Tegulae large, shining black. Wings clouded 

 by a moderate infuscation, nervures and stigma black. Thoracic dorsum 

 with sparse, erect, black pubescence densest on scutellum and thinnest 

 on disk where pale hairs are intermixed. Postscutellum, metathorax, 

 pleura and below with thin grayish white pubescence. Legs moderately 

 stout, black, their pubescence pale and thin. Anterior coxae with very 

 short inconspicuous blunt spines. Tibial spurs dark testaceous, not pec- 

 tinate. Claws rufous, deeply medially toothed. Abdomen stout, sub- 

 oval, almost bare, very polished, two basal segments practically iinpiinc- 

 tate, following segments very minutely and indistinctly punctured. Api- 

 cal margins of segments not at all depressed, the fasciae on 2-5 reduced 

 to mere fringes, easily worn off. The extreme lateral base of segment i 

 has some sparse white hair, and the disks of segments 3-6 have scattered, 

 short fuscous hairs. 



J\ Length 8 mm. Differs from the $ : Pubescence of vertex and 

 thoracic dorsum largely pale, well mixed with black on scutellum ; cly- 

 peus basally finely, closely punctured, apically polished and impunctate ; 

 antennae black, the flagellum brown beneath, joint 3 nearly equals 4, 

 taken with 2 much longer than 4, following joints one and one-half times 

 as long as broad , malar space a shade longer than broad ; punctures of 



