18 • THE CANADIAN ENTOMOLOGIST 



anteriorly on segment 6 with a lateral line on either side which appears on seg- 

 ments 3 to 5 as a detached antero-lateral spot. Segment 7 with the dorsum 

 black except for a narrow space across the anterior end and the- anterior two- 

 thirds of the mid-dorsal line which are pale. 



This female is distinguished at once by the two enormous pits or depressions 

 on the anterior ends of the mesepisterna. There is one under each mesostigmal 

 lamina. See figs. 4 and 5. 



In the figure (3) of the colour-pattern the abdomen is slightly rotated. 



This description should have appeared in the paper on new Argias, recently 

 published in the Canadian Entomologist, but was overlooked. 



SOME NEW LACHNIDS OF THE GENUS LACHNIELLA. 



(Homoptera-Hemiptera.) 

 by h. f. wilson, madison, wis. 



The genus Lachniella is now understood to be the correct genus for most 

 of the Lachnids formerly placed in the genus Lachnus. The type of the true 

 genus Lachnus is Lachnus fasciatus Burmeister, a species definitely determined 

 upon l:)y European aphidologists. This species has but one branch to the 

 median vein, while Lachniella has two forks. The writer has under preparation 

 a Monograph of the LachnincB of North America, but it now seems impossible to 

 have the illustrations printed until after the war, and so the following new species 

 are presented at this time. 



Lachniella inoptis, n. sp. 



From material collected by Mr. Theo. Pergande at Washington on Pinus 

 mops? Two slides containing one alate and four apterous specimens both 

 labeled Lachnus inoptis, n. sp. Types in collection of I J. S. Bureau of 

 Entomology. 



Apterous viviparous female. — Antennee light at the base and dusky at the 

 tip. Femora of all legs dark, front tibiae entirely black. Tibiae on middle and 

 hind pair of legs light coloured at the base and black over the distal two-thirds. 

 Antennae long and slender, the sixth segment finger-like and slightly shorter than 

 the fourth. Third segment approximately equal to the fourth and fifth together; 

 fifth considerably larger than the fourth. Third and fourth segments without 

 sensoria, fifth with one large sensoria at the distal end. Cornicles with a large, 

 acutely sloping base. Cauda acute, anal plate slightly disked. Hairs on 

 antennce, legs and body distinctly spine-like and long. 



Measurements. — Length of body 3.25 mm. Length of antennal segments, 

 III, 0.64 mm.; IV, 0.31 mm.; V, 0.37 mm,; VI, 0.22 mm. Total length L76 

 mm. Beak, HI, 0.25 mm.; IV, 0.25 mm.; V, 0.12 mm. Total length 2.08 

 mm. Length of hind \\\nx 2.39 mm.; hind tarsus, 0.25 and 0.37 mm. 



Alate viviparous female.- — ^Antennae light coloured throughout the third 

 segment except a small part at the distal end, fourth and fifth segments light 

 dusky at the base, darker at the tip, sixth segment entirely dusky. Femora 

 dark except at the base, tibiae dark at the knees and along the distal one-third, 

 the basal two-thirds light-coloured. Third antennal segment with a single 

 sensoria near the distal end, fourth segment with none, fifth segment of one 

 antenna with one large sensorium at the distal end, the other one with an 



January, 1919 



