the entomologist. 79 



Nematus Solea, VoU. 

 Larva and imago undescribed, 



I place the description of this insect immediately after that 

 of Nematus appendiculatus, on account of its agreement, in 

 its different stages, with the latter species. It is new ; at 

 least I have not been able to find a description of it anywhere. 

 Nevertheless, it may probably be Hartig's undescribed 

 Nematus xanthophorus of his table in the first year of the 

 " Stelliner Zeitung," with respect to which paper it is much 

 to be regretted that it has never been further worked out. It 

 may even be nothing more than the male of Nematus Laricis 

 of Hartig, with which he was unacquainted. 



I have called this species Solea, because, like the sole, it 

 is very dark on the upper surface and white on the under. 

 The larva, which lives on the larch (Larix), is full grown in 

 the middle of July (I received full-grown examples on the 

 26th of July, 1861, from the late D. J. Wttewaall), and has 

 twenty legs; it is entirely sap-green on the back and sides. 

 The head is very shining, somewhat broader than in the 

 former species, feuille-morte in colour, with two rather large, 

 round, black spots, in which the eyes are placed. The six 

 anterior legs are glassy green, with brown claws. The skin 

 of the back is very strongly wrinkled; the four or five 

 anterior segments have on each two transverse rows of 

 extremely fine spines. The last two segments are of a 

 paler and yellower tint; the ventral surface, together with 

 the abdominal and anal legs, are of the same sordid yellow 

 colour. 



On the 27th of July these larvse began to spin up among 

 the needles lying at the bottom of the glass in which they 

 were kept. The cocoon was shining, pale brown, and of the 

 same size as that of the former species. It was not more than 

 ten days before the imago appeared (see figs, d, e). My 

 cocoons only produced one imago, a male, which was about 

 four raillemetres long. The head was rather broad, somewhat 

 projecting between the eyes and the clypeus and labrum. 

 Eyes pretty large, oval, brown-gray; ocelli very widely 

 separated. The head was pale ochre-gray, with a broad 

 quadrangular spot on the vertex, of a sordid black tint. 

 Antennae, considering the genus, thick and short, pale 



