34 ^ nnals Entomological Society of A merica [Vol .11, 



DESCRIPTIONS. 



Winged viviparous female (from specimens collected in Chicago, III., July 

 23, 1908) : — Head pale yellow, with a blackish line on each side connecting with 

 the thoracic markings described later. (PI. VI, hg. 19.) Antenme black ex- 

 cepting the whiti.sh Ijasal halves of IV, V, and basal VI, a short area at middle 

 of III, and the filament of VI dusky; 10 to l(i transverse sensoria on the basal 

 half of III, one circular sensorium near apex of V and another at the apex of the 

 basal half of VI, around which are several smaller sensoria. All segments, espec- 

 ially the distal ones, with sti-ong imbrications which completely encircle the 

 antenna>, giving them the annulated appearance common in the antenna? of 

 Schizoncura, Tctrancitra, etc. Entire length slightly more than that of the body, 

 III longest, it being one third longer than IV, which is slightly longer than, or 

 subequal to, V, VI (base and filament) very little longer than IV, and the base 

 of VI somewhat larger than the filament. (PI. V, fig. 9.) Eyes bright red. 

 Beak reaching slightly beyond the coxae of the first pair of legs. Prothorax pale 

 yellow and the remainder bright yellow. A very conspicuous black stripe ex- 

 tends along each side from in front of the eyes to the base of the wings. When 

 the wings are in a resting position the black costal area on the wings gives the 

 appearance of a continuous black lateral line the entire length of the body. The 

 mesothorax also bears a brownish longitudinal marking on each side of the me- 

 dian dorsal. Wings hyaline, the costal area from the base to the stigma brown- 

 ish to black, the stigma similarly colored excepting a patch on the outer inargin, 

 and a brownish triangular patch at end of each vein; first and second discoidals 

 branching at about two fifths the distance from the tip of the wing to where the 

 third branches. (PI. V, fig. 10.) Two fore pairs of legs pale excepting the tarsi, 

 which are black. Hind pair pale excepting the black femora and tarsi, the 

 femora with about 15 or 20 pale circular ai-ea^ which look very much like the sen- 

 soria of the antennas when seen through a low objective, but with a 1-0 objective 

 they are found to be of hypodermic origin. (PI. V, fig. 11.) Abdomen pale 

 yellow, with two longitudinal rows of brown black spots on each side of the 

 median dorsal line, the row nearest the median line consisting of 8 spots and the 

 other row with 2 to .t spots. Cornicles pale yellow with a fine, almost indis- 

 tinguishable, dark apical margin, tuberculate in shape, and about one third the 

 length of the hind tarsus. (PI. V, fig. 12.) Stjde concolorous with cornicles, 

 globular and often with the "neck" barely constricted; 15 or 20 fine tuberculate 

 hairs projecting caudad. (PI. V, fig. 13.) Anal plate decidedly bifid. 



Measurements [taken from 12 specimens mounted in balsam] : — Length of 

 body, av., 1.97 mm. ; width, av. 0.61 mm. ; length of wing, av., 2.65 mm. ; width, 

 0.895 mm. ; wing expanse, approx. , 6 mm. ; antenna, I, 0.08; II, 0.065; III, 0.64- 

 0.74, av., 0.68; IV, 0.41-0.49. av., 0.44; V, 0.37-0.45, av. 0.41; VI, base. 0.26- 

 0.32, av. 0.28; VI, filament, 0.195-0.245, av., 0.215; average total, 2.17 mm ; 

 cornicles, 0.057 mm,; style, 0.145 min. ; hind tarsus, 0.155 mm. 



Wingless viviparous female : — I have never been able to find wingless vivi- 

 parous females, though I have made careful searches for them. Buckton has 

 described and figured what he calls the apterous viviparous female, but he does 

 not state when this individual was collected, and the characters given are too 

 incoinplete to decide whether or not it is the viviparous, or whether it is the 

 oviparous. I believe he has described the oviparous female under the head of 

 apterous viviparous female, as his description compares exactly with the ovi- 

 ])arous females which I have found in Illinois. 



Wingless oviparous female [from speciinens collected in Chicago, 111., Sep- 

 tember 15 and October 8, 1908]: — Head black or brownish, sometimes with a 

 pale median longitudinal line. (PI. VI, fig. 20.) Antennal segments I and II, 

 dusky. III, IV, V, and base VI pale at basal halves or two thirds, and black 

 the remaining lengths, filament VI blackish ; the usual sensorium at the end of 

 V, and one at end of the basal portion of VI, which is surrounded by several 

 smaller ones; imbrication slight on IV and V, but distinct on VI, although with- 

 out the conspicuous annulations of the winged viviparous antenna?. (PI. V, 

 fig. 14.) Total length slightly less than that of the body; III, the longest, being 



