8792 Insects. 



The mandibles (fig. 10) in the male are very narrow and long, 

 remarkably pointed, with two blunt teeth in the middle, and a notch a 

 little further towards the point. They are beset with fine hairs on the 

 outer border. 



The maxillae (fig. 11) consist of two membranous lobes, of which 

 the upper is somewhat triangular, and the lower more lancet-shaped. 

 The palpi, which are pretty long, consist of six small joints of about 

 equal length. 



The labium (fig. 12) is quadrate-elongate, a little broader anteriorly ; 

 the tongue is composed of three lobes, of which the central one is the 

 smallest and narrowest. The labial palpi have four joints, the last 

 being the longest. 



Frisch was acquainted with the imago of our insect, and probably 

 with the larva also ; nevertheless his description, numbered 25, in the 

 fourth volume of his 6 Beschreibung von Allerlei Insecten in Teutsch- 

 land,' evidently confuses this larva with that of the Cimbex living on 

 the alder, and which I shall provisionally, name lutea (as it appears to 

 me doubtful whether it is the same species as femorata), notwithstand- 

 ing that it constitutes a part of the variabilis of Klug. 



Although we have a superabundance of willows in this country, 

 this species of sawfly appears to occur but seldom, and may even be 

 called rare. I have never seen the imago on the wing, and M. Fran- 

 sen, whom I had requested to collect for me some cocoons, with 

 living larvae, in the neighbourhood of Rotterdam, where I had 

 formerly taken it, was only able, with much trouble, to get me ten, 

 which he had dug out of the decayed parts of hollow willow trees. 



I have not been able to observe the eggs. 



Capture, in Scotland, of a Cis new to Britain. — I send you an account of a Cis 

 new to Britain, which I have recently determined. It is at once distinguished from 

 all our other species by its even thorax, polished and even pubescent surface, and dis- 

 tinctly punctate-striate elytra. 



Cis lineato-cribratus, Mellie, Annales de la Societe Entomologique de France, 

 1848, p. 336, Plate 3, fig. 14 of the Monograph. 



The antenna? have ten joints, and it is a true Cis, though Thompson, in his recent 

 Part, places it under the genus Octotemnus, but admits that he has not had an oppor- 

 tunity of examining the structure of the antennae. My specimens are small, about 

 the size of Octolemnus glabriculus, but narrower, more elongate and cylindrical ; 

 chesnut-brovvn, with antennas and legs paler. The head of the male has two short 

 blunt horns. Thorax narrowly margined at the sides and posterior margin, shining, 



