Bassettia tenuana, new species

Host. — Quercus gainbelii Nuttall.

Gall. — Similar to those of Compsodryoxenus tenuis Weld. The insects gnaw individual exit holes through the brown bark, which after a year or two becomes cracked and rough.

Type locality. — Las Vegas, New Mexico. Galls were collected in a patch of runner oak of an unknown species on April 4, 1918. They then contained adults, and living flies were cut out which bear Hopkins U. S. No. 15601 dl . On April 19 similar galls were collected at Flagstaff, Arizona, on Quercus gambelii. They contained similar adults, which issued April 10-16 and bear Hopkins U. S. No. 15601 d .

Bassettia tenuana

Quercus gambelii, subturbinella [turbinella]
"Root" galls
Gall resembles Fig 1 [labelled tenuis--presumably this is Loxaulus tenuis?]

Bassettia tenuana Weld, 1921

Biology--Only the asexual generation is known which induces stem galls mainly at the base of young sprouts, with larval cells hidden under the bark on Q fendleri (=Q. x pauciloba [gambelii x turbinella]). Adults emerge in April.

Distribution--NM