ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 299 



7. Flagellum very long, two or more times longer than the scape, the fnnicle joints all cylindrical 8 



Flagellum not so long, at the most not more than one and a half times the length of the scape, the 



funicle joints gradually decreasing in length, not all the joints longer than thick, some at least wider 

 than long 9 



8. Antennae very long and slender, as in Psilophrys, the scape very long and slender ; cheeks not quite 



the length of the eyes ; ovipositor very long Parapsilophrys Howard (type P. gelechise How.). 



Antennte long and slender but shorter than in Psilophrys, about twice as long as the scape, the joints 

 of the funicle long and cylindrical, the club not or only a little thicker than the last joint of the 

 funicle ; cheeks long Liothorax Mayr (type Encyrtus glaphyra Walker). 



9. Flagellum at the most about one and a half times the length of the scape, the funicle joints gradually 



decreasing in length, some toward the apex transversely ; club much thickened ; obliquely truncate 

 from beneath ; head and mesonotum finely, closely punctate or shagreened ; frons somewhat nar- 

 rowed ; eyes bare Litomastix Thomson (type Encyrtus chalconohis Dalm.). 



Flagellum short, not much longer than the scape ; the funicle joints, except the first, not longer than 

 thick ; club stout, broader than the funicle ; frons broad ; eyes faintly hairy. Berecyntus Howard 



(type B. bakeri Howard). 



10. Cheeks as long as the eyes or nearly ; antennae rather long, the funicle joints, however, rarely more 



than twice as long as thick, gradually thickening apically ; the sixth joint never much longer than 

 wide and sometimes wider than long Copidosoma Ratzeburg (type C. boucheanus Ratz.). 



11. Cheeks more than half the length of the eyes ; pedicel hardly twice as long as thick ; the flagellum 



not long ; the joints of the funicle, except the first, small, not longer than thick, submoniliform, but 



gradually increasing in size Prionomitus Mayr (type Encyrtus mitratus Dalm.). 



Cheeks very short, nearly obsolete ; pedicel three times as long as thick, the flagellum short, cla- 

 yate, the joints of the funicle annular, wider than long, the club greatly enlarged, longer than the 

 funicle ; mesonotum short, twice as wide as long, the pronotum not visible from above ; frons very 

 narrow, the lateral ocelli close to the eye margin ; eyes large, rounded, pubescent. 



Archinus Howard (type A. occitpatus How.). 



12. Mesonotum smooth, impunctate, blue or metallic ; pedicel about thrice as long as thick, the flagellum 



long, the joints of the funicle much longer than thick, the club somewhat stouter than the funicle ; 



eyes pubescent ; scutellum, but not the axillae, shagreened Parencyrtus Ashmead. 



(type P. brasiliensis Ashmead). 



Mesonotum feebly, sparsely punctate, metallic blue or blue-green ; pedicel hardly twice as long as 



thick, the flagellum long and slender, joints 4-5 twice longer than thick, cylindrical, the club 



3-jointed, not thicker than the funicle ; eyes large," glabrous ; scutellum, as well as the axillae, 



sculptured Cerchysius Westwood (type Encyrtus subplanus Dalm.). 



13. Abdomen globose, or subovate, much shorter than the thorax, compressed, clothed with a rigid white 



pubescence, the second segment usually large, smooth medially ; species sometimes apterous. 14 

 Abdomen with the dorsum flat or concave, not rigidly pubescent 16 



14. Pronotum not large ; antennae simple, the flagellum usually long, subclavate, but not broad nor com- 



pressed 15 



Pronotum large, conical, longer than the mesonotum ; antennae with the scape and the flagellum 

 broad, strongly compressed; abdomen globose Mira Schellenberg (type M. macrocera Schell.). 



15. Head above rounded, seen from in front much longer than wide ; frons narrow ; scape long and 



slender ; scutellum not longer than the mesonotum, coriaceous ; abdomen ovate, as long as the thorax. 



Sphseropisthus Thomson (type S. pascuorum Thomson). 



