798 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
fairly bristling with protruding pupa skins are a eomm<>n sight on trees affected by 
these insects, Thesdoli insect i> Large, measuring 9 maa (.354 inch) in wing-expanse. 
The head is blackish, the thorax gray, and the abdomen dark red. The male antenna 
ar<- 26-jointed, with alternate single and double joints, all pedioeled; the female. 14- 
Fig. 270.— The pitch inhabiting midge.— After Couistock 
jointed. The main peculiarity of the adult form is in the remarkable gibbosity of the 
head, the eyes joining together at the summit and covering nearly the whole head. 
The wing-venation and other points are shown in the figure. The resiu exuding from 
the wounds in P. inoj)s is perfectly clear, and permits one to count the uumber of the 
larvte and to watch their every motion. 
44 We have as yet no data upon which to state definitely whether the 
eggs of the midge are laid upon the uninjured bark, and it is the work 
of the larvre in the bark which causes the resin to exude, or whether it 
is only in resinous exudations, caused bv a bruise or bv the work of 
some other insects that the eggs are laid. In the clear lumps on Pinus 
inop.s the larvae are always observed with their heads applied to the 
abraded bark. 
" Somewhat similar, though evidently distinct Larvae were found feed- 
ing in the resin exuding from the wounds made by the larva of Retinia 
comstoclx'iana in the twigs of Pinus rigida. It is probable that they may 
be Osten-Sackeirs Cecidomyia pini-inopis, but it is difficult to say posi- 
tively as his description of this species is so very indefinite.'' (Comstock.) 
Upon the loblolly piue (P. tcvda), however, it is milky, and the presence of the in- 
sect can not be ascertained without opening the mass. 
We have noticed the work of this gall-fly at Providence, the cast 
pupa skins being found protruding from the masses of pitch June 28. 
We have also observed it for many years past at Brunswick, Me. 
188 The pitch-pink needle gall ely. 
Diplosis pini-rigida Packard. 
Shortening and deforming the needles of the pitch piue, in Maine, early in May. 
orange-colored larro, which spin a cocoon toward the end of May ; the dy appearing 
probably in June, as the second brood ot Larva occur late in September. 
