— 
bo 
bho 
OrpeER—HYMENOPTERA. 
Species 1—DERECYRTA PICTIPENNIS. (Smith, 1. c.) 
Prats XXIII, Fie. 2. 
Ochracea, nitida: capite, abdominis apice, mandibulis, antennis, pedibusque nigris ; alis fuscis basi fasciaque 
transversali flavo-hyalinis, anticis cellula unica marginali, (Fcm.) 
Long. fem. 9-10 lin. ; expans. alar. antic. lin. 18}. 
Habitat ; Amazonia, Ega (Bates). . In Mus. Britann. et Hopeiano Oxonie. 
The mandibles are short and thick, obliquely truncate, and 4-toothed (fig. 2.@); the maxilla well developed, 
terminated by two membranaceous ciliated lobes ; palpi 6-jomted, the terminal joint indistinctly constricted and 
slender (fig. 24); the labium cordate, and the labial palpi 3-jointed, the last joint large and securiform (fig. 2 ¢) ; 
the antenne in the Oxford specimen 24-jointed (fig. 2d), and longer than in Xiphydria: they are inserted 
between the lower angles of the eyes; the head is black, the anterior half between the eyes rugose, the posterior 
half of the head glossy, smooth, with a slight impression behind the ocelli; the thorax is formed as in Xiphy- 
dria, equal to the head in width ; the abdomen is of equal width with the thorax, elongate, cylindrical; each of 
the basal segments is marked near the base on the upper side with a sinuated raised line; the terminal segment 
is obconic, glossy, terminating in a small horny point, beyond which the ovipositor extends to a short distance. 
Species 2—DERECYRTA BICOLOR. Westw. 
Prats XXIII, Fie. 1. 
Nigra, punctatissima: abdomine castaneo-rufo nitido ; segmento primo (fisso), secundi disco, ultimoque toto 
nigris ; antennis 26-articulatis ; pedibus nigris; alis brunneo-fulvis, purpureo parum tinctis ; cellis marginalibus 
duabus. (Mas.) 
Long. corp. lin. 9; expans. alar. antic. lin. 14. 
Habitat; Chili. In Mus. Hopeiano Oxonie. 
Head convex, closely covered with small punctures, two impressed longitudinal abbreviated lines between 
the eyes, united by a transverse one behind the ocelli; the terminal joints of the antenne are gradually attenu- 
ated to the tip; the mandibles (fig. 1a) are 4-dentate, the outer tooth acute, the others obtuse; the maxilla 
(figs. 14, 1c) are terminated by two flat, rounded membranaceous ciliated lobes, with a small appendage near the 
base of the inner margin ; the palpi are 6-jointed, the basal joint short, the second and fourth the longest, the 
third and fifth nearly equal, shorter, and inwardly setose: the sixth is twice constricted so as to appear 3-jointed 
(figs. 1d, le); the mentum is broadly cup-shaped, with the middle of the front margin produced and truncate ; 
the labial palpi are 4-jointed, the two intermediate joints being the shortest, the fourth ovate; the neck is not 
more than one-third of the length of the head; the abdomen is long, narrow, and subconvex, with the inter- 
mediate segments transversely depressed at the base, and they have a second transverse impression close to the 
hind margin of each; the apical segment is rounded, terminated by two broad 2-jointed appendages, between 
which is seen the slightly exserted extremity of the male organ of generation (fig. 1/, terminal joint seen from 
below; 14, seen from above). 
Spectres 3—DERECYRTA LUGUBRIS. Westw. 
Pirate XXIII, Fic, 3. 
Nigra. nitida: capite levi, facie et dorso thoracis punctatis; abdominis segmentis margine postico piceo ; 
antennis pedibusque nigris; alis fuscis, fascia pone medium flavescente, cellula unica marginali. (Fcem.) 
Long. corp. lin. 10; expans. alar. antic. lin. 18}. 
Habitat ; Brazil. In Mus. Reg. Holm. (F. Sahlberg) etiam in Mus, W. W. Saunders. 
The head is rather larger than in the first species; the abdomen gradually but slightly thickened beyond 
the middle to the penultimate joint: the joints have a slight transverse impression at the base, and a more 
distinct sinuated one beyond the middle of each segment; the pale fascia of the fore wing occupies the basal 
half of the marginal cell, the outer half of the first, and nearly the whole of the second submarginal cells, 
and nearly the whole of the large posteriorly adjacent cell; the central cell is oblong (not quadrate, as in 
D. pictipennis); the second recurrent vein is not straight, and is received nearly in the middle of the third 
submarginal cell, instead of near its base, as in D. pictipennis, and the central cell of the hind wing is much 
longer than in that species. 
