78 PKOCEIiDINGS OF THE NATIONAL MUSEUM vui.. 6S 



a tree was seen at Kichmond in the fall of 1917, and two j'ears later 

 the owner wrote : 



Ic is a pleasure to reimrt that the infestation has Llisapi>eared wholly and that 

 the tree is thrivinj>- and one of the prettiest in the row. No remedial measures 

 at all were taken, so it appears that the insects were either affected climatically 

 or were of a migratory nature. Following your visit, we had the severest 

 winter of some years and I lien the driest summer for some time. 



Pupae and adults were found in the galls December 8, and adults 

 may be obtained by opening galls in winter. Galls from Billy's 

 Island gave adults Febiuary 25 to March 9, but adults had not yet 

 emerged on April 4 from galls collected on fallen leaves in the gut- 

 ters on the streets of Jacksonville. Ashmead reared flies ISIarch "21, 

 1881. The alternating sexual generation is unknown. 



ANDRICUS MURTFELDTAE Ashmead 



This species was described from males onh' and no host oak was 

 given for the galls. The description of the female is here given 

 and some notes on the biology. 



Female. — Head and thorax black; abdomen red, darker antero- 

 dorsally ; legs and antennae ]ioney-yellow\ Face striate above mouth ; 

 malar space .5 eye, Avithout groove; vertex coriaceous. Antennae 

 13-segmented, lengths as (scape) 15 (width 7) : 8(7) :16(5) :12: 11: 

 10 : 9 : 8 : 7 : 7 : 7 : 7 : 13 (5) . Mesoscutum coriaceous with a few setiger- 

 ous punctures, shining. Parapsidal grooves deep, smooth, narrow, 

 percurrent. wider behind, a faint trace of a median behind. Scutellum 

 rugose, including the pits. Carinae on propodeum converging above. 

 Wing pubescent and ciliate, radial cell 3.2 times as long as broad, 

 open ; areolet small, reaching about one-seventh Avay to basal, cubitus 

 reaching basal; first abscissa of radius angled. Hind tarsus shorter 

 than (.8) tibia, its metatarsus not equal to 2-5 (without claw). 

 Claws with a tooth. Abdomen shorter than head and thorax, length 

 to height to width as 30 : 26 : 22 ; relative lengths of tergites along 

 dorsal curvature as 62 : 20 : 12 : 10 : 10 : 13, second bare at base. Ven- 

 tral spine bare, about twice as long as broad in side view. Using 

 width of head as a base the length of mesonotum ratio is 1.16, antenna 

 2.0, Aving 3.5, ovipositor 2.47. Range in length, 1.7-3.2 mm. Aver- 

 age of 24 pinned specimens, 2.54 mm. Range in length of 17 males, 

 1.5-2.9 mm. Average of 17, 2.24 mm. 



Uoat. — Queixus stellata. 



Galls. — Produced in clusters about small twigs at base of the new 

 growth, usuall}' only 2-4 galls becoming well developed. It is an 

 early spring gall, full grown but green and succulent soon after the 

 tree is in blossom. Adults issue from the galls during the last of 

 April in South Carolina and in late May and early June at Wash- 



