Disholcaspis regina, n. sp.
Agamic form

Gall. — Basically but not closely similar to that of D. perniciosa. More or less globose, vertically elongate and laterally compressed, often resembling grains of dent corn in shape, with a swollen and well-rounded top without a distinct tip, or with a tip barely indicated; rose-purple in color, yellow tan on the compressed surfaces which are unexposed to light; -entirely smooth and shining, without bloom or scurf; tip to 13. mm. in height and 8. mm. in diameter; occurring in dense dusters of up to 15 galls packed along the stems.

Host, — Quercus macrophylla [magnoliifolia], the largest-leaved white oak of the area.

Range. — Guerrero: Taxco, S NE — Probably restricted to the state of Guerrero, or to a portion of that state, in southwestern Mexico,

Life History, — Adults: January 20.

This insect, Disholcaspu regina, from an eastern locality in the state of Guerrero, is an extreme development in the perniciosa complex. The galls are unlike anything else in the complex, distinctly suggesting an elongate grain of dent corn. All of these characters are approached by the more northern species in the evolutionary line which leads to regina but regina is the most extreme development yet described in the group.