NYMPIIALINAE : THE GENUS BASILARCHIA. 251 



the middle of the upper border projecting!: as a narrow tongue backward between the 

 antennae, the lower edge convex, not very abrupt. Vertex very tumid, subglobular, 

 rising just above the level of the eyes, about as broad as long, broadly convex both in 

 front and behind ; upper border of the eye roundly angnlated opposite the middle of 

 the posterior half of tlie vertex. Eyes large, full, naked. Antennae inserted in the 

 middle of the anterior half of the head in a deep, broad pit, separated from each other 

 by a slender extension of the front; nearly half as long again as the abdomen, com- 

 posed of from forty to forty-three joints, the last fourteen or fifteen gradually ex- 

 panding into a nearly uniform club, scarcely twice as thick as the stalk, the last joint 

 abruptly conical with a slightly produced tip ; transversely circular, the club a little 

 depressed, furnislied on its lower inner face with four equidistant carinations, some 

 of which run (luite, others nearly, to the very base of the antennae. Talpi compact, 

 moderately stout, about half as long again as the eye, the apical joint scarcely one- 

 flfth the length of the penultimate ; heavily but compactly scaled and furnished with 

 short, nearly recumbent hairs, with a few longer more erect ones on the outer half of 

 the upper surface of the middle joint. Papillae crowded, edge outward, on outer edge 

 of apical flfth of tongue, apple-seed shaped, appressed and slightly arcuate, tapering 

 more gently toward base, apically rounded, but truncate, and cup-shaped at tip, the 

 rim entire ; the cup bearing a slender, bluntly pointed central filament. 



Prothoracic lobes pretty large, tumid, fabiform, nearly as long as high and nearly 

 three times as broad as long, slightly appressed, well rounded. Patagia but little con- 

 vex, nearly four times as long as broad, well rounded at base, tapering gently over 

 the basal two-thirds, apical third tapering more slowly to a very Ijluntly pointed apex 

 and bent outward at a slight angle ; the whole of the exterior margin and the basal 

 half of the interior slightly raised. 



Fore wings (38 : 9) subtriangular, three-quarters as long again as broad, the costal 

 border broadly and pretty regularly bowed, a little more curved on the apical than on the 

 basal half ; anterior third of the outer border strongly and regularly convex, the apex 

 well rounded, the lower two-thirds very slightly and regularly concave; inner border 

 straight, the angle rounded ofl". First superior subcostal uervule emitted beyond the 

 middle of the outer half of the upper margin of the cell ; the second shortly before the 

 tip of the cell ; the second inferior nervule arising one-third way down the cell ; the 

 latter a little more than one-third the length of the wing and tAvo and a half times 

 longer than broad. Median nervure connected opposite its last divarication Avith the 

 vein closing the cell. 



Hind wings : costal border pretty strongly convex at the base, beyond scarcely 

 bowed; outer border pretty regularly and strongly rounded, usually produced some- 

 what (J) or sometimes only and to a trifling extent (?) in the upper median inter- 

 space ; both angles so rounded that they are inconspicuous ; whole margin more or 

 less crenulate ; inner border pretty strongly convex at the base, beyond straight or 

 nearly straight to the tip of the internal nervure, just beyond Avliich it is a little 

 emarginate ; the internal area guttered as far as the submedian nervure, from the base 

 to the middle of the same, thence to the emargination of the inner border. Precostal 

 nervure bent outward, originating opposite the divarication of the subcostal from the 

 costal ; cell entirely open. 



Fore legs small, cylindrical, the tibiae scarcely half the length of the hind tibiae; 

 tarsi about thre-flf ths ( (J ) or three-fourths ( $ ) the length of the tibiae ; either sim- 

 ple, the joints scarcely discernible, very bluntly rounded at tip (J); or, distinctly 

 five-jointed, the first three-fifths the length of the entire tarsus, the others decreasing 

 slightly and regularly in size ; the first three armed at the tip on the under surface 

 with a pair of minute, very slender spines; apical joint ovate, bluntly pointed, termi- 

 nated by a minute, short, central spine ($). The whole leg is furnished with 

 laterally spreading hairs, much more abundant in the male than in the female. Middle 

 and hind tibiae of about equal length, furnished on either side beneath with a row of 

 rather short, slender spines, and on the upper portion of the inner surface with many 

 others, irregularly disposed; spurs long and very slender. Basal joint of tarsi fully as 



