Schizotetranychus eremophilus McGregor 1950

Schizotetranychus eremophilus McGregor

Schizotetranychus eremophilus McGregor, 1950:311.—Pritchard and Baker, 1955:251.—Tuttle and Baker, 1964:32.—Tuttle and Baker, 1968:95.

This species was collected from Cynodon dactylon (Linnaeus) Persoon, Mazatlan, 26 July and 20 miles south of Torreon, 4 August.

Schizotetranychus montanae Tuttle and Baker

Schizotetranychus montanae Tuttle and Baker, 1968:99.

This species was found on Pappophorum mucronulatum Nees, Torreon, 5 August.

Schizotetranychus nugax Pritchard and Baker

Schizotetranychus nugax Pritchard and Baker, 1955:264.—Tuttle and Baker, 1968:95.

One collection of S. nugax was made from Hilaria mutica (Buckley) Bentham, Torreon, 5 August.

Schizotetranychus species

A series of these mites was found on two grasses in Mexico: Scleropogon brevifolius Philippi, Chihuahua, 8 August; and Setaria macrostachya Humboldt, Bonpland, and Kunth, Chihuahua, 8 August.

This mite is similar to S. eremophilus McGregor in having the same general dorsal setal pattern. However, the Mexican mites have much shorter dorsal body setae, which do not or barely reach the bases of the setae of the next row.

Anatetranychus Womersley, 1940:261.—Tuttle and Baker, 1968:107.

Anatetranychus daleae Tuttle and Baker

Anatetranychus daleae Tuttle and Baker, 1968:110.

Specimens were collected from Dalea emoryi Gray, Hermosillo, 8 July.

Anatetranychus albiflora Tuttle and Baker

Anatetranychus albiflora Tuttle and Baker, 1968:113.

Collections of this species were taken from Brickellia species, Fresnillo, 3 August; Dalea tuberculata Lagasca, Fresnillo, 3 August, and Rancho Grande, 3 August; Dalea species, Fresnillo, 3 August; and Ipomoea species, Fresnillo, 3 August.

This genus is similar to Anatetranychus but differs in having a single set of duplex setae on tarsus I, and in that the dorsal hysterosomal striae and the lateral striae of the propodosoma are very widely separated and irregular. The empodia are clawlike and without ventral hairs. The propodosomal shield is pebbled. The dorsal body setae are long and set on prominent tubercles.

TYPE-SPECIES.—Atetranychus estebanesae, new species.