118 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
sisting of two at first incision, second of eight at second incision, third of five to eight 
caudad of fourth spine; median and lateral basal thickenings prominent; apical ven- 
tral chitinization strongly developed, brown; ventral longitudinal ridges fairly dis- 
tinct. (See Pl. XVIII, fig. 3.) 
Winged male (Pl. XIX).—Appears in June; at least no record of its earlier appear- 
ance can be found in literature, and the writer reared no males previous to this date. 
Head 0.06 mm. long, 0.107 mm. wide, about the same color as the thorax, nearly 
rectangular in shape, broadening somewhat at base. Eyes brownish in color, located 
on the side of head near the front. Ocelli two in number, on the upper part of the epi- 
cranium, and lighter in color than the compound eyes. Mouth parts apparently 
absent. Antenne about same color as thorax, bearing 10 segments, the basal one 
being short and nearly globose, others nearly uniform in size, with spines or hairs 
which are longer on the apical segment and absent on the basal. Length of antennal 
segments: (1) 0.016 mm., (2) 0.016 mm., (3) 6.049 mm., (4) 0.049 mm., (5) 0.05 mm., 
(6) 0.066 mm., (7) 0.049 mm., (8) @.032 mm., (9) 0.041 mm., (10) 0.04 mm. Width 
of segments: (1) 0.024 mm., (2) 0.016 mm., (3) 0.014 mm., (4) 0.016 mm., (5) 0.018 
mm., (6) 0.016 mm., (7) 0.016 mm., (8) 0.018 mm., (9) 0.018 mm., (10) 0.012 mm. 
Abdomen eight-segmented, having at the caudal end a long spikelike appendage, 
termed style or genital spike (see Pl. XIX, fig. 2), about 0.215 mm. long and 0.033 
mm. wide at base, tapering to a sharp point grooved below, forming a sheath for the 
penis, this sheath bearing four hairs or bristles at base, two on the dorsum and two 
stronger, ventrad. Thorax, general color pale clay-yellow, with edge of the thoracic 
shield darker, approaching cadmium-yellow; slightly longer than broad, crossed at the 
central part of dorsum by a heavy pale-brown band about one-half the width of the 
thorax at point of intersection; cephalic and caudal margins slightly concave, with 
blunt-shaped ends. Wings, length 0.56 mm., width 0.249 mm., covered with nu- 
merous spines, colorless, very narrow at base, bearing two main veins, the costal pre- 
senting caudal serrations (see Pl. XIX, fig. 4); located on the lateral margin of the 
metathorax are the ‘‘halteres,’’ or ‘‘balancers,’’ which hook into the lobes at the base 
of the wings, giving them additional strength. Legs about the same color as body; 
coxa very broad, stout, wider at base; trochanter nearly rectangular, stout, not so 
broad as coxa; femur narrower at proximal extremity, growing broader distad; tibia 
slender, with hairs near distal end; tarsus rather broad at base, gradually tapering 
toward claw, also with many hairs at distal end; claw broad at base and curved inward. 
Measurements of left posterior leg, as follows: 
Width. | Length. Width. | Length. 
| Mm Mm. Mm Mm. 
WOXKSME As ose Soe ae coe oes 0.03 0046") Libig! 22.55 so ee eee ae 0. 023 0.08 
Mrochanters sss ee eee | O11 Ol IBATSUSHe eee ee 019 061 
GM e: Oo See ee ee cee | 03 0927 (Claws 05-cnc seen eee oe ee 003 007 
PARASITES. 
SPECIES PREVIOUSLY RECORDED. 
In one publication’ Miss Mary E. Murtfeldt reports a species of 
Centrodora as being found parasitizing the grape scale. 
In another publication ? Miss Murtfeldt mentions that the grape 
scale is preyed upon by mites belonging to the genus Tyroglyphus. 
In 1888 and 1889 Miss Murtfeldt sent in a few specimens of a par- 
asite which proved to belong to the Chalcidide, subfamily Aphelinine, 
—_— 
136th Ann. Rept. Hort. Soc. Mo., pp. 118-119, 1893. 2 Insect Life, vol. 7, p. 5, 1894. 
