liU Journal New York Entomological Society. [Voi. vii. 



tliiinis and Dicyrtoina. But Bourlet did not see clearly the structure 

 of the antennae of Dicyrtoma, which he stated to be eight jointed. 

 He was misled, doubtless by poor magnifiers, to consider the slight 

 swellings on the second and third joints to represent the terminations 

 of so many joints. Lubbock, unable to see through Bourlet' s mistake, 

 erected a new genus, Papirius, for precisely similar forms. Since 

 Bourlet's name for these forms has the priority I believe it should be 

 used in spite of his mistake in generic description. Yet to my mind 

 it was a mistake so natural, and so easily explained, that there was no 

 excuse for not accepting Bourlet's name. Smyntluirns is readily, and 

 I believe naturally, divisible into two groups ; one having the fourth 

 joint of the antennae long and slender, and with at least fifteen annu- 

 lations ; the other group with the last joint of antennae shorter and 

 with less than ten annulations. The former group comprises the larger 

 forms. The differences which separate these two groups are evidently 

 not of as great value as separate them from Dicvrtonia, yet I think it 

 would be well to use at least subgeneric names to designate these groups. 

 Now the type of Smynthurus (^S. fuse its') belongs to the first group, and 

 that name must be retained for these species in case of a division ; 

 therefore I propose to give the subgeneric name of Bou)-letiella to the 

 latter group in honor of him who first seriously investigated these in- 

 teresting forms. S. Iiorfensis Fitch shall serve as its type. 



The following list of species which the writer has taken at or near 

 Sea Clifi", Long Island, cannot be considered complete, as other groups 

 often attracted more attention. Yet it is larger, doubtless, than can 

 be made of many localities ; and will serve, I hope, to induce others 

 interested in these tiny insects to list the species of their own regions. 



Our two genera may be separated by the following table : 



Antennie elbowed between third and fourth joints, the fourth joint longer than any 

 of the others, no tubercles on the dorsum of abdomen Smynthurus. 



Antennae elbowed between the second and third joints, the fourth (or apical) joint 

 shorter than the second, which is very long, often a pair of tubercles on dorsum. 



Dicyrtoma. 



Smynthurus Latr. 



I — Fourth joint of antennre long and slender, with at least 15 annulations [Siiiyn- 



thurus proper ) 2 



Fourth joint of antennre shorter, with less than ten annulations [Botir/etielhi) . .7 



2 — Dentes with spines each side, greenish species spinatus. 



Dentes without spines each side 3 



