Andricus lustrans (agamic)

Andricus robustus (agamic)

Callirhytis cressoni (sexgen)

Andricus dimorphus (agamic)

Andricus montezumus (agamic)

Druon fullawayi (agamic)

Andricus lustrans sp. nov.

Habitat.--Austin, TX, two females. The gall and male are not known.

Cynips vacciniiformis sp. nov.

Gall. — In clusters on the midrib of post oak (Quercus minor [stellata]), Monothalamous and moderately thick walled with a large round larval chamber. Globular and almost like a huckleberry or fruit of hack- berry (Celtis occidentalis) with a more or less distinct nipple at the apex and long petiole or stem at the base by means of which it is attached to the leaf. Brown when old and probably green when fresh. The outer surface is slightly roughened or almost smooth. Diameter 4-7 mm.; petiole 1-2.50 mm. long. 

Habitat. — Austin, Texas. 

The gall somewhat resembles that of C. dimorphus, but is larger and more globose. It occurs in clusters like dimorphus, but the galls are less closely together and not pressed out of shape, each individual gall retains its globose shape. The male is not known. 

Dryophanta cressoni sp. nov.

Gall.--Inside the young buds of post oak (Quercus stellata). It is practically nothing more than a minute round and thin shell, invisible from the outside. Diameter 1 mm.

Habitat.--Austin TX

Described from a single specimen. The male is not known.

Cynips dimorphus, sp. nov.

 Gall.— In masses on the basal part of the midrib or petiole on the underside of leaves of burr oak (Quercus macrocarpa), dwarf chestnut oak (Q . prinoides), white oak (Q. alba) and other trees belonging to the white oak group. They occur in rounded masses from a few to about thirty in each cluster. They are closely packed together, but each gall is separate and easily detachable. They are fastened to the leaf by a point, rounded on top and but slightly pressed out of shape, except basally. Monothalamous, almost globular, pointed basally, with the surface roughened, greenish, and more or less tinged with pink when fresh. Grayish when old and very hard. Hollow inside with a single round larval chamber. The individual gall measures from 2.50-3 mm. in diameter. The masses are from 6-15 mm. long and almost as wide. 

Habitat. — Evanston, Illinois, collected by Lewis H. Weld. The galls occur from the latter part of August until late in October, or into November, when they become mature and detached from the leaf. The flies emerge during the spring the following year. I have found the galls of this species on Quercus alba and Q. prinoides on Long Island, New York, and in New Jersey, but never succeeded in obtaining the flies. The four females described above were cut from galls by Mr. Lewis H. Weld, May 11, 1911. Mr. Weld's galls were taken on Quercus macrocarpa late in August the preceding year. The name for this species was proposed by the late Dr. W. H. Ashmead for specimens in his collection, but which he never described. Prof. C. P. Gillette recorded C. dimorphus from Michigan taken on the leaves of Quercus prinus, Q. macrocarpa and O. bicolor (Rep. Mich. Bd. Agricul., 1888, p. 469). Ashmead's specimens were collected in Florida.

Andricus montezumus sp. nov.

Gall. — On the twig of a species of live oak {Ouercus sp.). Polythalamous. Composed of a number of irregularly rounded bodies, tightly grown together and forming a solid mass. The outer surface is leather-brown, rugose with a number of fissures and cracks indicating the individual galls. Inside it is light wood-brown and exceedingly hard, almost like solid oak wood, making it difficult to cut with a knife. Length, 55 mm.; width, 35 mm. 

Habitat. — Mountains in Mexico, altitude 5000 feet. 

This species has been in my collection for some years past, and I do not remember from whom I obtained it, and the exact locality from whence it came. All I know is that it was collected in the mountains somewhere in Mexico. A similar kind of gall was sent to me by Mr. Lewis H. Weld, who collected the specimen at Lake Chapala, Jalisca, Mexico, from the mountains at the west end of the lake, above San Pedrito, in the summer of 1910. The male is not known. 

Andricus fullawayi sp. nov.

 Gall.— In a mass from a few to twenty or more covered with brownish or reddish-brown wool on the underside of leaves of white oak (Quercus lobata). Monothalamous. The individual gall is thin shelled and oval, light brown with the surface finely granulated. The galls stand upright on the leaf and are close together. The individual gall is 2 mm. high and 1 to 1.5 mm. wide. 

Habitat. — Palo Alto, California. 

The gall very much resembles those of Andricus langerus and Dryophanta ignota. It is the same species which Mr. David T. Fullaway referred to Andricus flocci (Ann. Ent,. Soc. Am., vol. iv, 1911, p. 352), but it is not this species. The seed-like galls of flocci are different as well as the flies. The male of fullawayi is not known. 

Descriptions of New Cynipidae (1913)