130 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



Measurements: Length 1.06 mm.; head, length 0.123 mm., width 0.135 

 nun.; prothorax, length 0.126 mm., width 0.153 mm.; pterothorax, width 

 0.204 mm.; abdomen, width 0.198 mm.; wings of fore pair, length 0.660 

 mm., width at base 0.057 mm., at middle 0.041 mm. 



Antennal segments: 1 34567 



length GU) 24 33 40 50 36 60 I'.s 



width GU) 32 24 22 22 17 18 8 



total length of antenna, 0. 271 mm. 



Male (macropterous) . Length about 0.9 mm. Color blackish brown, 

 with tarsi, apices of tibia?, pedicel of third antennal segment, and five or 

 six basal abdominal segments yellowish; thorax with orange-red hypoder- 

 mal pigment; fore wings brownish gray, nearly clear in basal third, beyond 

 which and at tip they are slightly darker. 



Head more slender than in female and slightly longer than wide. An- 

 tennae (Plate XV, fig. 1) with third and seventh segments small, and the 

 fourth and sixth elongate and bearing many long hairs; pedicels of segments 

 4 and 5 distinctly separated from segments themselves and freely movable. 

 Prothorax 0.8 as long as head and about 1.4 times as wide as long. 

 Abdominal sternites 3 and 4 with a pair of small, circular, pale areas at 

 lateral third; tergite 9 (Plate XV, fig. 2) with a pair of long, heavily chitin- 

 ized, finger-like processes arising from strong tubercles on posterior margin, 

 in addition to four pairs of long bristles of which an approximate median 

 pair are shorter. 



Measurements: Length 0.88 mm.; head, length 0.120 mm., width 0.115 

 mm.; prothorax, length 0.096 mm., width 0.138 mm.; pterothorax, width 

 0.180 mm.; abdomen, width 0.120 mm. 



Antennal segments: 1 2 3 (4) 4 (5) 5 6 7 

 length ( M ) 24 30 30 3 59 3 44 84 15 



width 0*) 30 24 21 8 20 8 18 IS 3 



total length of antenna, 0.292 mm. 



Distribution: 



Iowa. Ames, August and November (Beach). 



Massachusetts. Amherst (Hinds) . 



Florida. Quincy, September 8, 1909 (Morgan); Orlando. 

 November 4, 1914, C. B. Williams, 2c7's. 



Tennessee. Clarksville, April 2, August 19, and October 

 15, 1910 (Morgan). 



Maryland. Plummer's Island, July 27 and September 14. 

 1913, J. D. H., 29's. 



District of Columbia. Washington, November 3, 1914, 

 J. D. H., 2 9's. 



Illinois. Anna, Bondville, Carbondale, Clay City, Havana, 

 Hillery, Makanda, Muncie, Odin, Pulaski, and Urbana, through- 

 out the year, 14 9 's and 10 cf's. 



