1865.] 347 



N. B. — Are not mentioned in this table the species known in their wingless 

 form only (12. C. pezomachoides 0. S., 13. C. forticornis Walsh ami 14. C. hirta 

 Bassett) and the species which I havenotseen (II. C. flocci Walsh. :;o. C. sculpta 

 Bassett, 15. Philonix fulvicollis Fitch, 16. Ph. nigricollis Fitch. 17. Biorhiza 

 nigra Fitch). 



II. Synopsis of the described Galls of N. A. Cynips. 



Observation. — The numbers on the left hand of the names refer to 

 the Remarks on page 350 and the following. An asterisk near this 

 number means that I have not seen the gall, ami therefore cannot 

 judge with certainty about its location. As some galls have been de- 

 scribed (especially by Dr. Fitch) under the name of their guest-flies, 

 and had to change their name since the discovery of the true gall-flies. 

 I have mentioned their former name as synonym of the gall, which of 

 course does not imply the synonymy of the insects. All the galls of 

 the left-hand column are found on the group of the white and chestnut 

 oaks; all those of the right-hand column belong to the group of red, 

 black and willow oaks. This subdivision will render it easier to find a 

 gall in this synopsis, the more so as in no instance, as yet known, has 

 the same species of gall-fly been discovered on two species of oaks be- 

 longing to different groups. ( Compare above, page 842, No 2. ) Some 

 of the galls, the gall-flies of which are not known, may prove not to be- 

 long to the Cynijridse at all. 



Group of white and chestnut-oaks. | Group of red, hlack and willow-oaks. 



I. Galls on leaves. 



A. Galls not intimately connected with the substance of the leaf. 

 generally fastened by a small portion of their surface, ami which can 

 be removed without carrying a portion of the leaf with them, (project- 

 ing from one side of the leaf, or from the margin.) 



1. Globular galls, with a kernel in the centre, kept in position by 

 a softer substance (dry spongy, fibrous, or succulent) or by filaments, 

 radiating from it to the shell; all monothalamous. 



a. Kernel kept in position by a dry. spongy or fibrous substance. 



43. Q. prinus: gall-fly unknown. 22. Q. tinctoria: C. spongifica O. S. 



Syn. of the gall : confluens Harris. 

 *14. Q. montana; C. hirta Bassett. 23. Q. coccinea: C. q. coccineae 0. S. 



b. Kernel kept in position by delicate filaments. 



3. Q. obtusiloba : C. centricola 0. S. 24. Q. rubra? C. inanis 0. S. Syn. of the 



gall: confluens Fitch, (non Harris. I 



c. Kernel kept in position by a juicy substance. 



*-30. Q. rubra i , ± ,, 



C. sculpta Bassett. 

 *30. Q- tinctoria J r 



2. Globular or irregularly rounded galls of a hard, woody sub- 



