ART. 3 SOME 3srEW CHALCID-FLIES TIMBERLAKE 23 



basal joint somewhat yellowish white, the last two joints more or 

 less fuscous. In paler specimens the front femora have incomplete 

 whitish annuli near the base and the apical ring is much wider; 

 the apex of front coxae and the front trochanters yellowish white; 

 middle femora almost wholly whitish on the outer margin, the dark 

 ring at apex of hind tibiae very obscure or obsolete, the middle and 

 hind tarsi not much infuscated except on the apical joint. Wings 

 hyaline, the veins brownish. 



Length of body, (1.04 to) 1.73; length of head, 0.428; width of 

 head, 0.537; width of fronto vertex, 0.221; length of antenna, 0.'^06: 

 width of mesoscutum, 0.526; length of fore wing, 1.437; widtb of 

 fore wing, 0.657 mm. 



Male. — Very similar to the female, except that the pale markings 

 on the head are larger and more or less confluent, the orbital mark on 

 cheeks sometimes uniting with the dot between the scrobes and the 

 eyes and then with the dot on the anterior corners of the frons, also 

 broadening to join the spots below the antennal sockets, so that 

 the whole lower part of the face is pale except for an inverted 

 V-shaped mark between the antennal sockets and oral 'nargin; flagel- 

 lum brown. 



Length of body, (1.17 to) 1.29; length of head, 0.344; widtii of 

 head, 0.438 ; width of f rontovertex, 0.200 ; length of antenna, 0.763 ; 

 width of mesoscutum, 0.412; length of fore wing, 0.992; width of 

 fore wing, 0.462 mm. 



Described from 16 females and 10 males (holotype female, .allo- 

 type, and paratyprs) reared February 3 to April 5, 1919, from 

 Tachardiella Im^eae (Comstock) on greasewood, collected at Arling- 

 ton, Arizona, January 23, 1919 (Charles H. Gable). The parasites 

 were reared out at Washington, D. C, by C. S. Menagh. 



Type.—C2ii. No. 28144, U.S.N.M. 



Two females reared from the same host collected at Pigeon Pass, 

 near Riverside, California, January, 1908, (California State In- 

 sectary), are apparently the same species but are not included among 

 the types. They differ in having the pale markings on the head very 

 faint and partly obsolete. 



GAHANIELLA, new genus 



Similar in some respects to Agromyzaphagus Gahan and comes 

 next to that genus in my manuscript table of genera- In Mercet's 

 table of genera the female runs to Ooencyrtus and tiie male to the 

 first alternative in couplet 87, where it runs out, as the occi]vltal 

 margin is acute and the thorax is not at all brilliant netallic. This 

 genus is named for A. B. Gahan, of the United States National 

 Museum, in recognition of his careful work on parasitic Hymenoptera. 



Genotype. — Gahaniella calif ornica^ new species. 



