26 GENERA OF HYMENOPTEKA. 



otK'-thtrd lonjftT tliiiii fourtli, in % excised, joints lonfj, cyliTidrical, 

 Ninall at l>aHf, Knt'lualiy thicki-ncd und truncate at ti|>: 9 1''< % l'**- 

 Juintt^ Bf'loiioriieniH Muyr. 



Scutelliini bifovcate : marginal nerviirealnKiHt straiKht, i-iidinK HunicdiHtance 

 froni costal c<lgc; third alHloniinul scKnicnt l>ut sliftlitly sliiirtfr than 

 second; antenna; reaching Iwm* of ab<lonien, flagellur joints cylindrical 

 oval, 9 i:< 14. % 14 jointed DlMMtrophtiM Hurtix. 



Scutelluni with two shallow transverHc fttvtne; winKs long, iiuiixinal nervure 

 reachinK costal etlKC, tip slijfhtly bent and obtusely thickened, (aKamic 

 form with long hairs on antennie, legs and thorax); |M.-tiole in % long; 

 antenna* subflliforni. lon>;> third joint but sliKhtly longer than I'ouith, 

 9 13-14, % 15-jointed ....Dryophaiita Fiirster. 



8«'utelli;ni with a deep transverse suture, no fovea'; abdomen greatly com- 

 l)res8ed. knife-edged lielow ; ventral valve long; antennie 9 14-jointed. 



Tribalia Walsh. 



Scutelluni inflated, foveie shallow and almost confluent; anteniiie, third 



joint shorter than fourth, % i:i-jointed AutiMlrophiiH Walsh. 



tt. — Scutelluni with two fovete ; marginal nervure reaching, or not (juite reaching 

 castal eilge, tip thickened, obtuse; antennte : third joint in 9 twi<-e or 

 one-third longer than fourth, joints beyond eighth oval, cylindrical, or 

 beyond fourth very short; in % long, cylindrical, or oval cylindrical, 9 



l'i-ir>, % 14-lf>-jointe(l AildricUM Hartig. 



Claws with one tooth ; antennae, third joint in % twice or one-third longer 

 than fourth, others long, sul)e(|ual; in % third joint excised, iK-yond 



fourth very short Subgenus Callirhytis Forst. 



Claws with two teeth ; antennte : third joint one-third longer than fourth, 

 joints to eighth long, cylindrical, subequal, following joints short. 



Subgenus Andricus Hartig. 



Scutelluni (ai)terou8 form) with one fovea; head much broader than thorax, 

 wide back of eyes; abdomen large and long, with third, fourth, fifth and 

 sixth segments sulH'qual ; antennte with joints beyond third short, cy- 

 lindrical, small at base, truncate at tip. somewhat serrate ; (winged form) 

 marginal cell (juite narrow, with the marginal nervure barely retiching 

 costal edge; antennae longer and much more slender than in the wing- 

 less form, third joint in % greatly excised, following joints short, 9 14, 



% 15-jointed Biorhiza Westw. 



7. — Thorax narrow, head full behind the eyes. Species .smooth. 



Scutelluni without fovete and ending in a blunt horn ; forms apterous, or 



with rudimentary wings; antennte 9 14-jointed AvraspiH Mayr. 



Scutelluni with a transverse curved groove at base, no fovea* ; f.ice full, 

 cheeks with a distinct groove; antennte: third joint in 9 long, slender, 

 cylindrical, others long, cylindrical oval, subequal ; in % third joint thick- 

 ened, excised, following joints short, 9 1«^> % l.'>-jointed. 



liOxaiiliiM Mayr. 

 Thorax robust, bulging. Species rugose, not very hairy. 



Scutellum quadrate, elevated posteriorly, bifoveate ; abdomen globose ; mar- 

 ginal nervure acuminate, ending some distance from costal edge ; wings 

 black, or with a large blotch at base of marginal cell ; antennse .short, 

 third joint nearly twice as long as fourth, others short, cylindrical, 9 

 13-14, % 15-jointed Amphibolips Keinh. 



