42 THE CANADIAN ENTOMOLOGIST 



Fifth segment with two large or one large and two small sensoria. Beak reaching 

 to tip of abdomen, wings as usual in the genus. Nectaries not quite as large as in 

 apterous forms, and cauda more rounded. 



^ Measurements. — Length of body 2.25 mm. Length of antennal segments: 

 III, 0.62 mm.; IV, 0.25 mm.; V, 0.27 mm.; VI, 0.187 mm. Total length L5 

 mm. Length of beak 2.15 mm. Length of hind tibiae 2.6 mm. 



Lacimifclla montana, new species. 



Description made from three apterous specimens on one slide. Material 

 sent to me by Prof. C. P. Gillette and designated as a new species by him under 

 the name Lachnus montamis collected by Prof. Gillette at Cimmaron, Colorado, 

 on oak August 22, 1906. 



Apterous viviparous female. — General colour cannot be determined. 

 Antennae light coloured throughout, legs slightly darker without black areas. 

 Antennae reaching slightly beyond the hind coxae, third segment not as long as 

 the fourth, fifth and sixth together. Third and fourth antennal segments 

 without sensoria, fifth with one at the distal end. Beak reaching slightly beyond 

 the hind coxae. Abdomen with a row of distinct tubercles along each side, 

 which are raised areas on the front edge of each tracheal opening. A few scat- 

 tered glandular areas are also to be found on the abdomen. Each hind tibiae 

 has a number of round to oblong sensoria on the upper side of the basal one- 

 third of the segment. It is possible that the specimens at hand are oviparous 

 females, but it hardly seems possible that this form would occur in that climate 

 as early as August. The cauda and oval plate are slightly distinct. 



Measurements. — Length of body 3.5 mm. ; width 2 mm. Length of antennal 

 segments: III, 0.72 mm.; IV, 0.31 mm.; V, 0.4 mm.; VI, 0.25 mm. Total 

 length 1.67 mm. Beak: III, 0.23 mm.; IV, 0.21 mm.; V, 0.083 mm. 



Lachniella burrilli, new species. 



From material collected by Professor A. C. Burrill on Sabina scopiilonun 

 at Twin Falls, Idaho, July 6, 1917. One alate specimen in good condition, one 

 apterous specimen in poor condition and a number of larvae. Mr. Burrill states 

 that these were found on the underside of the limbs feeding on the bark, and 

 that they greatly resembled the colour of the bark. Mr. Burrill's notes on 

 coloration are included in the descriptions. Specimens of what is evidently 

 the same species but difTering slightly were sent to me from Fort Collins, Colo- 

 rado, by Professor C. P. Gillette. These were collected on the same food plant. 

 Types in writer's collection. 



Apterous viviparous female. — General colour closely resembles the bark, 

 being black with pruinose patches which produce a calico efTect. Antennae 

 cream-coloured at the base and black at the tip. Abdomen with two rows of 

 black blotches along the median line and two rows of black dots dorso-laterally 

 along the abdomen. Legs with the femora black, and the tibiae black at the tip. 

 Nectaries black, cauda light coloured. Antennae with third segment less than 

 length of fourth, fifth and sixth segments. Fourth longer than the sixth. Third 

 segment with three sensoria, fourth with one and five with one. Nectaries small 

 conical, and diameter of base not much greater than that of the opening. Body, 

 legs and antenna' moderately hairy, hairs short and inconspicuous. 



Measurements. — Length of body 3 mm. Length of antennal segments: 

 III, 0.42 mm.; IV, 0.2 mm.; V, 0.17 mm.; VI, 0.12 mm. Total length 1.3 mm, 



