196 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxm. 



Hind wings vAthout a distinct venation, and always vAth an anal lobe; females 

 often apterous; middle tibife with two apical spurs; antennae, 10- to 

 26-jointed Family XXXII. Betiiylidje. 



4. Trochanters 2-jointed; middle tibiae with tivo apical spurs; eyes normal, not emar- 



ginate within; antennas long, filiform, 15-jointed or more, similar 



in both sexes Family XXXIII. Trigonalid^. 



Trochanters l-jointed; middle tibiae with one apical spur; eyes reniform or emar- 

 ginate within; antennae in female 12-jointed, in male 13-jointed. 



Family XXXIV. Sapygid.e. 



5. Middle coxae contiguous or nearly 7 



Middle coxae distant, usually widely separated 6 i 



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



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

 middle tibiae with two apical spurs. j 



Pygidium in male deeply emarginate at ajiex, the hypopygium terminating in | 

 a sharp thorn or aculeus, which curves upward and rests in the | 

 emargination of the pygidium; claws cleft. | 



Family XXXV. MyziNiDiE. I 



Pygidium in male entire, or at most with only a slight sinus, the hypopygium li 



terminating in three spines; claws simple. | 



Family XXXVI. Scoliidje. | 



Stigma in front wings well developed, ovate or subovate; eyes entire, never emar- i 



ginate within; pygidium in male entire, the hypopygium termina- < 



ting in a sharp aculeus, which curves upward. I 



Family XXXVII. Tiphiid^. j] 



7. Females always apterous, and frequently, but not always, without ocelli; eyes Is 



variable 9 (' 



Females always winged, with ocelli; eyes large, always extending to base of ji 

 mandibles 8[' 



8. Abdomen sessile or subsessile, and often with a more or less distinct constriction j 



between dorsal segments 1 and 2; front wings with the stigma well 1 1 

 developed, the marginal cell usually attaining the costa at apex 'i 

 (rarely rounded or truncate at apex, with a slight space between, j 

 Cosila and allies); hind wings usually without an anal lobe, thai, 

 cubitus either interstitial or originating beyond the transverse j i 

 median nervure, very rarely originating before it; tibial spurs 1, 2, i 

 2; tarsal joints normal; eyes entire; ocelli normal; hypopygium j :; 

 entire, not ending in a spine or an aculeus. I . 



Family XXXVIII. Cosilid.*!. i « 

 Abdomen longly petiolate; front wings with the stigma small, not well developed, i 

 the second recurrent nervure subobsolete; hind wings bilobed, thej ( 

 cubitus originating far beyond the transverse median ner\aire; tibial ' i 

 spurs very long, straight; tarsal joints 2-3 in female dilated, deeply! j. 

 excised or lobed, and filled with a membrane between the lobes;ij d 

 eyes emarginate within; ocelli very large; antennae very long, fili-; t 

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



Family XXXIX. Rhopalosomid^.i f 



9. Middle tibite with two apical spurs, rarely with one only, or none in some niales. ( 



Middle cox;e usually slightly separated by a triangular or bilobed projection t 

 of the mesosternum; females with the thorax divided into three; ' 

 parts, the pygidium usually subcompressed or otherwise formed, i 

 usually abnormal; hypopygium in male most frequently armed. J 



Family XL. TnYNNiD.S!.! k 



