136 NEMATUS ZETTEttSTEDTI. 



tegulae pale red ; cencliri small ; the pleuros quite smooth and shining. 

 Abdomen narrowed and longer than the head and thorax, tapering 

 towards the apex, the back black ; the sides of the back, the extreme 

 apex, and belly reddish ; the blotch is small ; the cerci pilose, black, 

 pointing inwardly ; the sheath black, scarcely projecting. Legs red- 

 dish, posterior tarsi and apex of tibiae black ; the posterior tarsi are 

 thick, deeply sulcated, the patellae large, claws bifid ; the calcaria red- 

 dish, a little shorter than half the length of the metatarsus, the inner 

 spur being double the length of the outer. Wings hyaline, the nervures 

 deep black ; costa and stigma reddish-testaceous ; the first transverse 

 cubital nervure is faint ; second cubital cellule double the length of the 

 third ; second recurrent nervure received somewhat in front of the 

 second transverse cubital nervure. 



The (according to Thomson) has the eighth abdominal segment 

 keeled in the centre. 



Length 3f lines. 



Ab. a. Antennae brownish beneath. 



b. The orbits entirely black. 



c. A large spot on upper side of mesopleurse 

 reddish, 



This large species may be recognized by the deep 

 frontal sutures, brick-red colour, deep black posterior 

 tarsi, deeply sulcated tibiaa, &c. 



The arrangement of the colour is the same as in 

 N. myosotidis, but the colour of the abdomen and legs is 

 deep brick red, not yellowish, the antenna are shorter 

 than the body, and quite bare, the stigma is testaceous, 

 not yellowish, and it is a longer and stouter insect. 



The larva is described by Andre (1. c.) as living on 

 Populus nigra. It is yellowish-green, with the head 

 and forelegs black ; on the first four segments are a 

 great number of black points, the rest are uniformly 

 coloured on the back, but dotted with black on the 

 sides. Brischke bred it from a larva on aspen, 

 which apparently did not differ from that of N. umbri- 

 pennis. 



Apparently a rare insect. I have only seen two 

 specimens, one taken by Dr. Buchanan White at 

 Braemar, and another in Stephens' Collection in the 

 British Museum, said to have been taken near London. 



The only Continental localities that I have seen 

 recorded are Sweden, the Hartz Mountains, and 

 France. 



Obs. Zetterstedti is in Stephens' collection under the name of N. 



