121 
.V. rufocinctus, Harr. i female. (Type) June 26th, Alder. 
N. bivittatus, Norton. 2 females. May 17th, June iolh. 
N. thoracicus, Harr. 1 female. (Type,) May lUh. 
N. similaris, Norton. 1 female. June 26th, Acacia. 
N. Hneatus, Harr. 1 female. (Type,) May 5th. 
N. ribesii, Scop. 8 females. April 23rd, July 1st. 
The larvae of this species devour the foliage of the cultivated 
currants and gooseberry, and do serious damage when the plants are 
neglected. A simple treatment with hellebore proves very efficacious 
in staying their ravages, and a small parasite which has been found 
recently to attack the eggs, may perhaps aid in lessening the numbers 
of the pest. 
N. S7(adus, Cress. 2 females. 
N. aureopectus, Norton. 6 females. May 10th, 30th. 
N. pkuricus, Norton. 1 female. May gth. 
A^. lateralis, Norton. 1 female. May 9th. 
N. mefid'cus, Walsh. 1 male, 9 females. May 9th, June 26th. Willow. 
N. s. pomum, Walsh. male and female. From Willow galls. 
N. gallicola, Steph. (Messa hvaltna, Norton ?). 16 females. June and 
July. The galls of this species are very abundant on willows during the 
entire season. 
N. inquirinus, Walsh? 1 female. August 15th. 
N. ocrealus, Harr. 1 female. May 16th. (Type). 
In addition to the 32 species (?) enumerated, there are a number of 
specimens not determined. The genus Nematus is so extensive that 
many of the species cannot be satisfactorily determined. When more 
of the species have been carefully bred, and when a thorough study 
is made of the genus, many of the species will doubtless prove to be 
but variations. Very many of the commoner species feed on willows, 
so that feeding is easy ; the most difficult part of the breeding is the 
carrying through the pupoe when buried in the earth. 
Fenusa. 
F. varipes, St. Farg. 21 females. June 9th, August 26th. 
Also a European species, which has badly infested alders at the 
