230 
have been sent us by Mr. Coquillett as reared from the so-called " Yel- 
low Scale," the one having perfectly clear wings, as shown in Mi\ 
Craw's earlier figure, and the other having the fore- wings with a fus- 
cous band, as shown in his later figure. I shall not push this point, 
however. Mr. Craw may have described two distinct insects under 
one name. If so, we shall accept his second and presumably more 
careful figure and description as carrying the name. Mr. Craw's refer- 
ence of the form to the genus Coccophagus was probably based upon 
our original determination as sent to Mr. Coquillett, but unfortunately 
for this reference the form sent us was the clear- winged one, and that 
which bears Mr. Craw's name has other generic affinities. Mr. Coquil- 
lett sent us specimens of the dusky- winged form bred January 18 and 
24, and February 2, 1889, from San Gabriel scales and from these spec- 
imens, as well as from Mr. Craw's figure, we tentatively placed the 
species in Fcerster's genus Encarsia (Insect Life, Yol. iv, p. 168). More 
prolonged and critical study, however, renders it evident that a new 
genus must be erected to contain the species. 
Aspidiotiphagus gen. nov. 
Female. — Antennae 8-jointed; scape long, slender; pedicel a little longer than 
its apical width; funicle joints 1, 2, and 3 increasing in width, hut each approx- 
imating pedicel in length; club long, distinctly 3-jointed, basal joint shortest, 
apical joints sub-equal, terminal joint pointed. Lateral ocelli equi-distant from 
each other and margin of compound eyes. Parapsides of mesoscutum widely sepa- 
rated, very narrow posteriorly, broadening out rapidly towards tegulae ; mesoseu- 
telluni like that of Aphelinus, its scapulae longitudinally elongate and extending 
forward to lateral widening of the parapsides; metanotum very narrow. Abdomen 
short, broadly sessile and broadly rounded at tip. Spur of middle tibia? very slen- 
der, as long as the short, first tarsal joint. Fore wings long, narrow; submarginal 
and marginal veins sub-equal in length ; post-marginal lacking ; stigmal very slight 
and parallel with costa, situated at half the wing length and exactly opposite to the 
termination of thickening of hinder margin of wing; this being also the widest 
point of the wing ; cilia of wing surface rather sparse, a clear rounded space imme- 
diately below stigma, and a narrow clear line around margin ; marginal vein bristly ; 
marginal cilia very long, longer than wing width, those on costal margin just 
beyond stigma nearly as long as those on hind margin. Hind wings very narrow, 
with long marginal cilia and but one row of discal cilia on outer third; marginal 
vein ending abruptly and extending up apparently beyond costa. 
Differs from Coccophagus in wings and from Encarsia in antennae and wings. 
Aspidiotiphagus citrinus (Craw). 
Female. — Length 0*58 mm ; expanse 1*16 mm ; greatest width of fore wing 0*09 mm. 
Antennae light yellow-brown; eyes black, ocelli bright-red; head yellow; occiput 
dark brown; pronotum dark brown ; mesonotum yellow ; metanotum yellow-brown ; 
abdomen brown; legs uniformly dusky yellow; wings with marginal vein dark fus- 
cous, and a broad fuscous band extending directly across wing from marginal vein 
as a base. Spiracular hairs on pre-anal abdominal joint very long. Thorax some- 
what wider than head or abdomen, these being sub-equal in width. 
Eedescribed from 14 2 specimens reared January 18 and 24, Febru- 
ary 2, and March 13, 1889, by D. W. Coquillett from Aspidiotus auran- 
tii Maskell, var. citrinus, from San Gabriel, Cal. 
