186 



JOURNAL, OF ENTOMOLOGY AND ZOOLOGY 



(Fig. 3) 

 Date of Collection 

 The insects are most abundant during the spring and summer and 

 were especially numerous during those months in 1912 and 1913. 

 Serial number 62. 



Fig. 3 — Lachnus glehnus n. sp. A, wings of winged viviparous females; B, antennal 

 articles III and IV of various winged viviparous females; C, tarsi of hind leg of 

 winged viviparous female; D, antenna of winged viviparous female. From 

 cotypes. (Original.) 



General Considerations 



Before preparing this description the writer sent specimens to 

 many of the leading workers of the Aphid'ida in the United States 

 and it was not until after hearing from these that the work was 

 undertaken. Some of these workers have made some very good 

 suggestions which I am very glad to record as follows : 



"Your No. 62, collected on P'lcea glehni seems to be sufficiently 

 distinct from Lachnus ponderosa to call it a different species. So far 

 as I can make out from what I know of the Lachnids off hand it is 

 a new species. It is remarkably close to ponderosa but one notices 

 from the first that the hairs on the legs of ponderosa are compara- 

 tively short and more or less spine-like while those on the legs of 



