^8 BRITISH APHIDES. 



Laohnus PICE.E, Walk. Plate C. 



Lachnus grossus, Kalt. 

 Aphis jpicecB, Panz. 



Apterous- viviparous female. 



Inch. Millimetres. 



Size of body 0-190 X 0-090 4-81 X 2*27. 



Length of aiitenn93 0-070 1-77. 



Cornicles wartlike. 



Yery large, long oval. Head and thorax shining 

 pitch black ; the latter pitted with depressions. Eyes 

 prominent, black. Antennas very short and attenu- 

 ated, black, the two last joints tuberculate. Abdo- 

 men smooth, domed, slightly carinated, colour dull 

 sooty black, lustreless. The ring, fourth from the 

 apex, covered with a cinereous mealy coat, v^diich is 

 continued to the under side. Cornicles very small. 

 Cauda none, but the anal ring is garnished with 

 brown hair. Legs pilose and very long, particularly 

 the hind pair ; colour rich sienna-brown, with black 

 femoral and tibial points. Tarsi distinctly two-jointed. 

 Postrum very long, but it does not extend beyond 

 the caudal end, black. 



This is a large and handsome species. Numerous 

 specimens were kindly sent to me in the month of 

 October by Mr. Joseph Anderson, of Alresford, Hamp- 

 shire, where he found them in the greatest profusion 

 on the trunks and boughs of the spruce fir, Abies 

 excelsa. A severe frost set in the evening after these 

 insects were captured, and the next morning all bad 

 " vanished as if by magic." A few days afterwards 

 sunny weather again set in, and the insects once more 

 came out in full force. The sudden disappearance 

 and the reappearance of this and other species is 



