138 PROCEEDINGS OF THE ACADEMY OF [1897. 



a distinct median groove, finely and tolerably closely punctured, a 

 few much larger punctures scattered about; distance between eyes at 

 top fully equal to joints 3 to 5 of antenna? ; clypeus, a small supra- 

 clypeal area, mandibles except ends, palpi and antenna? ferruginous ; 

 clypeus with minute close punctures except in the middle, where they 

 are large and sparse, anterior margin gradually rounded, sublaterally 

 angled, but hardly dentate; antenna? short, scape swollen, with a 

 conspicuous bulla, first three joints of flagellum of about equal length. 



Dorsulum with fine close punctures, the mesothorax with thin short 

 reddish-orange pile, not easily noticeable, shining almost silvery just 

 in front of scutellum in certain lights; scutellum not impressed me- 

 dially ; middle segment very finely transversely striate, appearing 

 almost sericeous. Legs quite spinose, the anterior tarsi especially 

 with very long spines, seven on the first joint, and two on each of the 

 following three ; hind spur of hind tibia nearly as long as first tarsal 

 joint. Abdomen impunctate, pygidial area not nearly twice as long 

 as broad, very sparsely punctured. Wings hyaline, nervures ferru- 

 ginous. 



Hab. — Rincon, New Mexico, at flowers of Chilopsis saligna Don, 

 (Bignoniacese), July 5, 1896 (Ckll., B. 4), one specimen only. It is 

 quite distinct from all other species by its coloration ; it comes nearest, 

 apparently, to A. eonferta Fox, which has a black thorax, etc. 



Astatus bigelovise n. sp. 



9 . — Length 11 mm., anterior wing 7? mm., smooth and shining, 

 entirely pitch black. Front with large close pits, one might say 

 deeply malleate, area between each lateral ocellus and the eye smooth 

 and impunctate, distance between the eyes at the top about equal to 

 antennal joints 2 to 4, first joint of flagellum a little longer than 

 second ; scape swollen, sparsely punctured ; upper part of clypeus 

 and supraclypeal area impunctate ; anterior margin of clypeus sul- 

 catulate, gently rounded, curved outward ; lower part of cheeks, 

 and mandibles at base and beneath, with black bristles ; cheeks 

 otherwise with sparse long silvery hairs ; antepenultimate joint of 

 labial palpi produced at tip, with the outline of a right-angled tri- 

 angle, very broad at base, the penultimate joint springing from near 

 the apex ; mesothorax with large punctures, close in front, becoming 

 sparse and irregular caudad, the surface between the punctures irreg- 

 ularly transversely striate; tegula? very dark brown ; disc of scutel- 

 lum shining, with a few very large punctures ; middle segment above 

 minutely cancellate, appearing coarsely granular under a low power ; 



