48 Journal New York Entomological Society. [VoI.vil 



Hind wings zoithoiit distinct venation and always with an anal lobe ; females 

 often apterous ; middle tibiae with two apical spurs ; antennae lo-i5-jointed. 



Family XXXI. BETHYLID.-E. 



4. Middle tibi;v with two apical spurs, eyes normal, not emarginate within ; antennpe 



15-jointed or more, similar in both sexes Family XXXII. TPvIGONALIDi-E. 



Middle tibia- with one apical spur ; eyes reniform or emarginate within ; antennae 

 in 9 12-, in $ 13-jointed Family XXXIII. SAPVdID.-E. 



5. Middle coxa contiguous or nearly so 7 



I^Iiddle coxa distant, usually widely separated 6 



6. Stigma in front wings not well developed, at the most only slightly developed, 



either very small or linear ; eyes most frequently emarginate within ; middle 

 tibia with two apical spurs. 



Pygidium in $ deeply emarginate at apex, the hypopygium terminating in a 

 sharp thorn or aculeus which curves upwards and rests in the emargination of 

 the pygidium ; claws cleft Family XXXIV. MYZINID.F:. 



Pygidium in $ entire or at most with only a slight emargination, the hypopy- 

 gium terminating in tiiree spines ; claws simple. 



Family XXXV. SCOLIID.F]. 

 Stigma in front wings well developed, ovate or subovate ; eyes entire, not emargi- 

 nate within ; pygidium in $ entire, the hypopygium terminating in a sharp 

 aculeus which curves upwards Family XXXVI. TIPHIID.E. 



7. Females always apterous and most frequently, l)Ut not always without ocelli ; eyes 



variable 9 



Females always winged with ocelli ; eyes large, always attaining the base of the 

 mandibles _ 8 



8. Abdomen sessile or subsessile, usually with a more or less distinct constriction be- 



tween the dorsal segmenis i and 2 ; front wings with the stigma well developed, 

 the marginal cell usually attaining the costa at apex (rarely is it rounded at apex 

 with a slight space between, Cosila and allies) ; third wings usually without an 

 anal lobe ; the cubitus either interstitial or originating beyond the transverse 

 median nervure very rarely originating a little before it ; tibial spurs I, 2, 2 ; 

 tarsal joints normal ; eyes entire ; hypopygium entire, not ending in a spine or 



aculeus Family XXXVII. COSILID.F. 



Abdomen longly petiolate ; front w'ings with the stigma not well developed, the sec- 

 ond recurrent nervure subobsolete ; hind wings bilobed, the cubitus originating 

 far beyond the transverse median nervure ; tibial spurs very long, straight ; tarsal 

 joints 2-3 in 9 dilated, deeply excised or lobed and filled with a membrane be- 

 tween the lobes ; eyes emarginate within ; ocelli very large ; antenna very long, 

 filiform, the joints with a bristle-like spine at apex. 



Family XXXVIII. RHOPALOSOMID/E. 



9. Middle tibiae with two apical spurs, rarely with one spur in some males. 



Middle coxa usually slightly separated by a triangular or bilobed projection of 

 the mesosternum ; females with the thorax divided into three parts, the 

 pygidium usually subcompressed or otherwise formed, usually abnormal ; 

 hypopygium in males most frecjuently armed. 



Family XXXIX. THYNNID-E. 



