l68 MAINK AGRICULTURAIv EXPE;RIM]iNT STATION. I912. 



characterized as in Figs. 302 and 303. Pwpa has same color 

 markings as the alate female. 



Fig. 284. L. strobi. Antenna of alate viviparous female. 



The eggs of Lachnus strobi are very common on the white 

 pine needles, where they occur in shining black rows. Those 

 observed in 1908 hatched about the middle of May. Different 

 collections of this species have contained individuals which 

 varied much in size but the antennal measurements given will 

 indicate relative proportions. Hairs of antennze and legs are 

 stiff. 



Lachnus pini Weed. The oviparous female of a Lachnus on 

 Scotch Pine was described and figured by Weed (1890) as 

 Lachnus pirn L. The apterous and alate viviparous females of 

 apparently the same species is common on Scotch Pine about 

 Orono. This species seems in accord with Lachnus pineti 

 Koch as discussed and figured by Cholodkovsky (1898) and 

 may prove to be that cosmopolitan species. For the present it 

 seems sufficient to link it with the records given by Weed. Fol- 

 lowing is an account of the material taken in Maine. 



Apterous znviparous female. Head, thorax and abdomen of 

 about uniform color, varying shades of brown according to 

 length of time from molt. Dorsal and lateral head, thorax and 

 abdomen finely peppered with black dots. The whole insect 

 covered with tawny hair. The antennee with HI pale, IV, V, 

 VI darker to black. Measurements III, 0.625 mm; IV, 0.25 

 mm; V, 0.4 mm; VI, 0.23 mm. There are no sensoria except 

 the usual distal ones of V and VI. The beak extends tO' middle 

 of abdomen. 



The abdomen is hirsute, sometimes cinnamon brown, some- 

 times reddish brown with a white pulverulency that gives a 

 pinkish cast. Thpre is less pulverulency at the caudal half and 

 it is most conspicuous along the mid dbrsal area. There are 

 two longitudinal stripes of dark greenish bronze which some- 

 times appear as longitudinal rows of dark bronze green patches 

 along the margin of the whitened mid dorsal area. The abdo- 

 mens of the older individuals have very bronzy reflections. The 



