174 PSYCHE [Oct.-Dec. 



long conical flattened, antennae inserted midway between the eyes and the 



tip of the rostellum ; proboscis geniculate at the middle trinotatus, sp. n. 



Markings of abdomen arranged in a double series ; head in profile more or 



less hollowed out at the antennae; proboscis geniculate before the middle 



19. 



19. Abdomen witli whitish markings beneath, at least in the middle: face very 



long and sharp, frequently paler above; thorax shining; 3 mm. 



acutirostris Loew 

 Abdomen black beneath ; if the face is long the thorax is not shining 20. 



20. Thorax granular, subshining, sparsely pubescent ; facial projection long, acute; 



humeral mark small, frontal spots punctiform . . lo/iee/eri, sp. n. 



Thorax polished, nearly bare ; face short, black ; humeral mark large ; frontal 



spots transverse ........ beUulus, sp. n. 



21. With a whitish spot on each side of the front above the antennae . 22. 

 With no whitish spot on the front ...... .25. 



22. Facial projection shorter than width of eye; antennae inserted near its tip; 



lateral line of thorax obsolete ...... hniesii^ sp. n. 



Facial projection equal to width of eye, antennae inserted near its base 23. 



23. Lateral line of thorax w^ell defined ....... 24. 



Lateral line of thorax obsolete ....... tristis Bigot 



24. Head and thorax nearly bare, subaenescent . . canadejisis Loew 

 Head and thorax moderately pilose, with a greenish tinge . arafor, sp. n. 



25. Sides of thorax with a yellowish line . . . . . . 27. 



Sides of thorax not marked ; black shining species . . . . 26. 



26. Anterior tibiae subfuscous, hind ones black except extreme tip and base 



carbonarhis Loew 

 All the tibiae vittate with black ..... carnens Walker 



27. All the femora and tibiae black; thorax with a greenish tinge glaher Loew 

 Front and middle tibiae ratlVer yellowish ...... 28. 



28. Blue-green species .......... 29. 



Black, shining species tiigrintis Falle'n 



unicolor Loew 



29. Facial projection longer than width of eye . . crassiis Loew 

 Facial projection shorter than diameter of eye . . . unicolor, var. 



