228 ENTOMOLOGICAL NEWS [xxxii. '21 



Mordw. and the writer considers them as identical. Conse- 

 quently the Lachnus pinicola Kalt. of both Walker and Buck- 

 ton is really Dilachnns pinihabitans (Mordw.). Theobald 

 records p'micolns Kalt. from Kent and Morley from Suffolk 

 and the Isle of Wight. Jackson records pinicola Kalt. from 

 spruce fir in Evanton and Kent and lists it as a synonym of 

 abicfis Walker. As pointed out above (see No. 10), a specimen 

 of abictis Walker in the Buckton collection is really hyalinus 

 Koch, so perhaps Miss Jackson refers to this species. She also 

 records pinihabitans Mordw. from Scotch fir in Moreyshire. 



15. Dilachnus taeniatus (Koch). Walker; three slides (1 alate, 8 

 apterous 99); "pini L. ; Scotch pine ; Southgate ; June 25-47." Buck- 

 ton ; four slides (numerous immature 99); "pini L. ; Pinus sylvestris; 

 Meadfield ; June." The following brief description is drawn from 

 Walker's specimens : 



Alate viviparous female. Head about twice as broad between the 

 eyes as deep ; antennae reaching to the middle of the thorax, dark ex- 

 cept base of III, which is lighter; a few stout hairs on I, II, and III. 

 Secondary sensoria on III extend from near the tip to about two-thirds 

 the way to the base ; small, circular, uneven, numbering 6-7. IV with 

 one secondary sensorium about the middle. Ill about as long as IV, V, 

 and VI combined, IV and V equal, VI slightly shorter. Ill 0.644, IV 

 0.252, V 0.210, VI 0.196, total 1.526 mm. Body length 5.17 mm., width 

 of thorax 2.26 mm., wing length 5.30 mm., width 1.75 mm., expansion 

 12.20 mm. Cornicles small and inconspicuous, being but little more 

 than pores, about 0.085-0.110 mm. in diameter. Cauda large and promi- 

 nent, half-moon-shaped. Hind tarsi long, first joint 0.28 mm., second 

 0.50 mm. Rostrum reaches to near the base of the abdomen or to the 

 posterior edge of the second abdominal segment. Body robust and cov- 

 ered with many short stiff hairs. Wings long, clear, and with twice- 

 branched media. 



Apterous viviparous female. Similar to alate, the body hairs being 

 stiffer and more pointed. Antennae reach to the base of the abdomen 

 and are without secondary sensoria. Ill 0.630, IV 0.308, V 0.350, VI 

 3.224, total 1.722 mm. Body length 4.52 mm., width of thorax 1.35 mm., 

 hind tarsi, first joint 0.252, second 0.476 mm. Rostrum reaches to base 

 of the second abdominal segment. 



A study of these specimens shows that they are very similar 

 to Eulachnus taeniatus (Koch), although in many respects close 

 to Eulachnus nudus (De Geer). In taeniatus (Koch) of Del 

 Guercio the third antennal segment is longer in comparison 



