Melikaiella sonorae comb. n.

Callirhytis sonorae

Only the asexual generation is known to induce acorn galls on red oaks (Q. emoryi), distributed in Mexico and USA (Weld, 1944). The galls are flattened masses of cells (3-10) inside the surface of the acorn, beside the much-reduced cotyledons. Galls occur in autumn and adults emerge in April to June (Weld, 1944)

Range: Mexico (Sonora), AZ, TX

Callirhytis sonorae

Quercus emoryi
Acorn galls
Like Fig 12. 3-10 cells inside "bellotas" from Mexico and liable to be found in the US.

Callirhytis sp.

Quercus emoryi
Acorn galls
Never reared. Fig 12.

Callirhytis sonorae, new species

Host. — Quercus emoryi.

Gall (pl. 1, fig. 7). — A flattened brown mass of 3-10 cells inside the acorn beside the much-reduced cotyledons, the number of cells evident on the surface. Masses measure up to 10 mm. long.

Habitat. — The type is selected from a series bred from acorns from Santa Ana, Sonora, Mexico, taken from baggage at quarantine at Nogales, Ariz., on September 28, 1935 (No. 10348). Adults issued on April 10, 1937, April 2, 1938, April 3, 10, 15, 1939, April 7, 17, 1940, April 7, 12, 1941, April 12, 15, 1942, and April 16, 1943. Paratypes are from Hermosillo, Magdalena, and other points in the state of Sonora. Earliest emergence was March 10. Galls from Cusion, Cuchuta, Esqueda, Guaymas, Fronteras, and Nogales (all in Sonora) have been found in "bellotas" in the personal baggage of Mexicans crossing the border. Over 60 lots have been intercepted, mostly at Nogales, Ariz., a few at Naco and Douglas, Ariz., and a few at El Paso find Ysleta, Tex,