288 [September 



on each side of the clypeus a black spot ; antennae two-thirds the length 

 of the body, porrect, pale rufous, blackish toward the tips. Thorax 

 black, densely and finely punctured ; middle of mesothorax faintly sul- 

 cate and havini>; on each side of this an abbreviated dull rufous stripe 

 connecting with the sutural line which is also broadly dull rufous ; 

 tegulae yellowish ; a line beneath the front wings rufous ; scutelluni 

 very much elevated, in the shape of a stout, subobtuse tubercle, bright 

 rufous, yellowish behind and black laterally ; postscutellum with a yel- 

 low spot ; metathorax scabrous, black, clothed with short black pubes- 

 cence; the elevated lines sharply defined. Wings yellowish, apical 

 margins fuliginous, with a violaceous reflection ; nervures fuscous, their 

 base, as well as the stigma and costa, yellowish-ferruginous ; areolet 

 oblique, slightly petiolated. Legs yellowish-ferruginous; the coxas and 

 the posterior femora except extreme base and apex, black. Abdomen 

 flattened above, with a slight carina down the middle ; basal segment 

 sharply bicariuated, yellowish-ferruginous, the petiole black ; the second 

 segment also yellowish-ferruginous ; remaining segments yellow, paler 

 towards the apex; the 3rd, 4th and 5th segments above with a subob- 

 solete ferruginous dot on each side. Length 9 lines ; expanse of wings 

 17 lines. 



Hah. — Rocky Mountains, Colorado Territory. 



Genus HOPLISMENUS, Grav. 

 Hoplismenus thoracicus, n. sjj. 



Pale rufous; head, mesothorax, most of hind legs and apex of abdomen, 

 black; a broad anuulus on anteanfe and a spot on tip of abdomen, white; 

 wings hyaline. 



Male. — Head entirely black, palpi pale ; antennae very slender, rather 

 longer than the body, black, the 3rd to 5th joints pale rufous, the 8th 

 to 13th joints white, spotted beneath with blackish. Thorax pale ru- 

 fous, very finely and closely punctured ; mesothorax and pectus, black ; 

 scutellum gibbous, acutely carinated on each side, pale rufous, as well 

 as the postscutellum ; metathorax finely rugose, the elevated lines sharply 

 defined, the central area moderate, transversely subquadrate, the poste- 

 rior face obliquely depressed, the lateral tubercles not very prominent, 

 obtuse; tegulse piceous. Wings byaline, faintly iridescent; nervures 

 and stigma fuscous, pale at base ; areolet small, subtriangular. Legs 

 slender ; with their coxae, pale rufous, the four anterior trochanters, 



