I903] MELAXDER:— NORTH AMERICAN SPECIES OF NEMOTELUS i^-j 

 4. Nemotelus carbonarius Loew. 



Niimotelus carbonarius Loew, Cent., viii, 6. (0 



Johnson, List ins. New Jersey, p. 639. (2) 



Male and female. Bare, black, shining, antennae concolorous, front immaculate, no 

 lateral line on the thorax, femora black except the yellowish tip, anterior tibiae subfuscous, 

 hind ones black, ba.se and extreme tip of all yellowish. 



Very much like Nemotelus utiicolor, but different in its smaller size and in possessing 

 no pale line on the side of the thorax. Halteres subfuscous. Eyes of the male subcontig- 

 uous. [Translation.) 



Length of body i lines {2).2> mm.), length of wing i^^ lines. 

 Lenox, Massachusetts, (Osten Sacken) (') ; New Jersey *^^-'- 



5. Nemotelus tristis Bigot. 



Nemotelus tristis Bigot, Ann. soc. ent. France (6), vii, 1887, p. 30. (i) 



Male. Face produced as a cone. Black over all, shining; two whitish spots above the 

 antennae, halteres white, knees, base of the tibiae, and the tarsi except the tip pale fulvous ; 

 wings hyaline, the strong veins at the base pale yellow. 



Female. Very much the same. 



Male. Face prolonged in a sharp cone, at least equal to the length of the head. 

 Entirely shining black, two white spots situated above the base of the antennae ; halteres 

 with white knob ; extremity of the femora, the knees, base of the tibiae and of the tarsi, of a 

 very pale reddish; wings absolutely hyaline, except that the external veins are lightly tinged 

 with yellow. (Translation.) 



Length 4 mm. 

 California. <■> 



6. Nemotelus glaber Loew. 



Nemotelus gluber Loew, Cent., x, 10. (i) 



Female. Bare, shining, black, dorsum of the thorax and the scutellum faintly greenish, 

 front immaculate, thorax with a very fine whitish lateral line, femora and tibiae black, tarsi 

 white, the last two joints of the fi'ont ones and the last joint of the hinder ones fuscous, 

 knob of the halteres black above. 



Bare, shining, black. Front broad, unspotted. Antennae brownish black, towards the 

 base dull red. Face produced into a rather stout acute cone. Dorsum of the thorax and the 

 scutellum obsoletely green from a black ground color; the lateral line of the thorax very 

 fine, whitish. Legs black, the knees dull whitish and the tarsi white, but the last two joints 

 of the front ones and the last joint of the others" fuscous. Halteres whitish, the knob black 

 above. Wings whitish, the stronger veins very pale, the rest completely uncolored. 

 (Translatiott.) 



Length of body if— if lines, length of wing i \ -i§ lines. 

 Texas, Belfrage. <'^ 



