The Zoologist — December, 18(58. 1469 



are of the usual brownish yellow colour. It will be seen that the 

 median teeth of the saw are semitiifoliate. 



Selandria ovata seems to be generally distributed throughout 

 Europe ; it has been taken in this country in many different localities 

 where alders were growing. 



Nematds pallicercus, Hartig. 



For the imago, see Harlig, Blatt. unci Holzwespen, p. 190, No. 13. 

 The larva is undescribed. 



Nemalus luteus, antennis, genis, occipite, dorso, macula pectorali 

 tarsisque posticis nigris, alarum stigmate et costa pallidis. 



The larvae of this and the following species * of Nematus indicate 

 that they belong to the same group as Salicis and Wttewaalli. The 

 food of the present species, however, clearly appears to be poplar, and 

 not willow, on which the two last-named species feed. 



In the month of August, 1S59, I observed upon a poplar tree in my 

 garden, at Leyden, some larvae (fig. 1), which seemed to me to differ 

 in colour and marking from all the species with which I was acquainted, 

 and further observation confirmed the fact that I had a new species 

 before me : my larvae were somewhat less than two centimetres long, 

 and rather stout in proportion to their length. The colour on the 

 dorsum was shining bluish gray-green, yellowish green on the sides 

 and under surface. The anterior border of the first segmeut, especially 

 at the side, the eleventh segment, and the margin of the last, were 

 orange-yellow. The thoracic legs were pale green, with black spots ; 

 claws brown ; the abdominal and two anal legs were yellow. Head 

 small and shining black ; on the back were three rows of contiguous 

 black spots. At the sides were some round mostly elliptical spots, 

 irregularly placed, the most conspicuous being two transverse spots 

 above each leg, and above these a triangular spot; on the upper sur- 

 face of the last abdominal segment was a large quadrangular black- 

 spot, which was continued posteriorly on two rather long processes. 

 The spiracles were veiy small and nearly circular. These animals 

 were almost always feeding; when half growu they merely bit holes 

 in the leaf, but on attaining their full size they ate into the border 

 also, and only left the principal nervures. They were full grown in 

 the first week of September, and on the 6th and 7lh of that month 



* Nemalus aurantiacus "f Harlig. 



