March, '09! ENTOMOLOGICAL NEWS. 121 



duced on vertex; eyes dark red, prominent, without ocular tubercles; 

 dorsum smooth or with very minute tubercles on small brown spots, 

 but along the lateral margins are lines of small tubercles bearing fla- 

 bellae ; cornicles not longer than broad, somewhat dusky and upon a 

 dusky field; cauda capitate, dusky; antenna dusky except basal half 

 of joint three; legs short and stout, tibiae of hind legs but little longer 

 than 3d joint of antennae; femora blackish; tibiae blackish at knees, 

 paler below, tarsi blackish ; tibiae with thickened or somewhat flabel- 

 late hairs on outei margin; beak very short, barely surpassing ist 

 pair of coxae; color a pale yellowish green peppered with small brown 

 specks and having large darkened areas above. The dark areas ex- 

 tend along either side of the dorsum, beginning at the antennae and 

 ending at the cornicles. They are broken into three pairs of blotches, 

 one pair extending over head and prothorax, one pair upon meso- 

 thorax, and one pair upon abdomen before and extending to the cor- 

 nicles; and there is a small one just before the cauda. Larval forms 

 lack the large dark patches but have their backs finely peppered with 

 dark specks and a dusky streak on either side of the median line upon 

 head and prothorax as shown in figure 3. 



WINGED FEMALE, PLATE I, FIG. 2. 



Described from specimens taken at Fort Collins, Colo., June 

 8, 1908, by L. C. Bragg : 



Length, 1.50 to i./o mm.; width, .70 mm.; antennae, 1.40 mm.; joints 

 proportioned as in apterous form; 3d joint with about 15 very minute 

 circular sensoria, not tuberculate ; dark markings similar to apterous 

 form except that the whole middle portion of mesothorax and meta- 

 thorax above are black, and the mesothorax is black below ; head 

 broad between antennae, large; length of wing, 2.25 mm.; stigma short, 

 broad and dark smoky in color as are the veins, each nerve ending in 

 a dusky blotch ; posterior wing with veins smoky also and with but one 

 discoidal ; otherwise like apterous form. 



Comparatively few alate examples but many pupae were taken. 

 Both apterous and alate forms are active jumpers. A few sweeps of 

 the insect net will take this louse by the thousand now. 



Sexual forms have not been studied. 



EXPLANATION OF PLATE VIII. 



Callipterus flabcllus: I, apterous viviparous female; f, flabellus of 

 preceding much enlarged; 2, alate viviparous female; 3, larva of 

 apterous viviparous female before last molt ; 4, antenna of alate fe- 

 male ; Brachycolus ballii: 5, alate viviparous female; 6, antenna of pre- 

 ceding. The lice are enlarged 20, and the antennae 80 diameters. 



