p 



REPORT OF THE STATE ENTOMOLOGTST I918 



159 



mm in diameter and tightly packed in the cones. I'he galls are 

 evidently modified or aborted seeds. 



Retinodiplosis inopis 0. S. 



1862 Osten Sacken, C. R. Mon. Dipt. Am., 1:196-97 (Cecidomyia) 



1890 Packard, A. S. U. S. Ent. Comm., 5th Rep't, p. 800 (Diplosis) 



1891 Riley, C. V. & Howard, L. O. Insect Life, 4:126 (Polygnotus pini- 

 cola Ashm. reared) 



1906 Felt, E. P. N. Y. State Mus. Mem. 8, 2:752 (Cecidomyia) 



1910 Smith, J. B. Insects N. J. List, p. 732 (Cecidomyia) 



191 1 Felt, E. P. Econ. Ent. Jour., 4:465 (Cecidomyia) 



1912 Econ. Ent. Jottr., 5:368-69 (Itonida) 



1913 Econ. Ent. Jour., 6:331 (Itonida) 



191 8 N. Y. State Mus. Bui. 200, p. 15 



This midge produces obscure subcortical swellings (fig. 30a) in the 

 smaller branches of the scrub pine, Pinus rigida and P . 

 virginiana, spins cocoons on branches and needles (figs. 3C6, c) 

 and occasionally becomes very abundant and somewhat injurious 

 The midges issue the latter part of May or early in Jtme. This 



Fig. 30 Retinodiplosis inopis: a, swollen shoot showing two exit holes; b, yoiing 

 shoot bearing three cocoon^?; c, Pine needle bearing one cocoon 



species approaches the pitch midge, Retinodiplosis resin- 

 icola O. S., from which it may be distinguished by its larger 

 size, darker color and the shorter antennal stems of the male. The 

 distal three antennal segments of the females are illustrated in figure 

 31. It is somewhat smaller than the western pitch midge, R. 

 resinicoloides Wlms., a form easily separated by structtiral 



