THE ENTOMOLOGIST. 
Vou. XIL.] NOVEMBER, 1879. [No. 198. 
DRYPE TA REPPOU PAT A 
By Epwarp A. Fireg, F.L.S. 
Sea 
ON 
TRYPETA RETICULATA. 
Or the numerous and very pretty gall-making Trypetide but 
few species are known as British. This is probably owing 
to their being overlooked more than to their actual absence; the 
galls or pseudo-galls are in most cases only the deformed 
ovaries or flower-heads of various Composite ; hence the insect- 
inhabited heads are not readily noticeable. A familiar exception 
to this usual flower-head inhabitancy is the beautiful Urophora 
cardui, L., whose galls are large many-chambered (1 to 8) swell- 
ings of the stems of the universally common creeping thistle 
(Carduus arvensis). Our other gall-making species is still 
further removed from the general habits of the genus, as 
T. guttularis, Meigen, was bred from galls at the top or collar of 
the roots of Achillea millefolium (Proc. Ent. Soc. Lond., 2nd ser., 
vol. il., p. 43). 
To this meagre list of gall-making T'rypetide I /addéal in 
1872, Urophora solstitialis, L., which deforms the ovary of the 
common knapweed (Centaurea nigra) into a hard, woody, but 
only tactiley noticeable, gall (Entom. vi., 142). Now, thanks to 
the perseverance of Mr. F. Enock, the gall-making 7’. reticulata, 
Schrank. (— pupillata, Fallen., Meig., Macq., Zetterst.), 1s proved 
to be a British species. The pretty Trypeta continua, Meig. 
(= Spilographa alternata, Fallen.), which so often deforms the 
OT 
