MACROTRACHELIA. 321 
than twice as long as 1, 3 and 4 equal in length, each much shorter than 2. Rostrum about reaching 
the anterior coxe. Pronotum slightly hollowed at the sides, the anterior lobe almost smooth, the posterior 
lobe transversely rngulose. Orifice of the metastethium transverse, curving forward externally. 
Length 33-33 millim. (¢ 92.) 
Hab. Guatemaa, San Gerénimo, Las Mercedes (Champion). 
Six specimens. Very like M. nigronitens, but differing from it in having the third 
antennal joint entirely pale and the elytra distinctly vittate. . The eyes in the male are 
very large and separated bya space not much wider than the produced anterior portion 
of the head; those of the female are small and very little more than half the width of 
the interocular portion of the head. 
5. Macrotrachelia nigronitens. (Tab. XIX. figg. 18, ¢; 19,194, 4, 2.) 
Anthocoris nigronitens, Stal, Rio Jan. Hemipt. i. p. 48 (¢)'. 
Macrotrachelia nigronitens, Reut. Ofv. Vet.-Ak. Forh. 1871, p. 566, t. 7. fig. 9 (9) ?; Monogr. 
Anthocorid. p. 58°; Stal, Enum. Hemipt. iii. p. 102 *. 
Moderately elongate, narrow, subfusiform, clothed with a few scattered hairs, shining, the elytra opaque, a 
narrow space down the outer part of the corium and the outer edge of the cuneus excepted ; black, the 
elytra sometimes with a narrow piceous or fusco-testaceous vitta on the outer part of the corium extending 
from the base downward, the membrane broadly hyaline externally, the basal half of the third antennal 
joint ochreous, the tarsi usually testaceous at the base; the posterior lobe of the pronotum and the 
scutellum with very fine scattered silvery pubescence, the elytra with fine lines of glistening golden 
pubescence on the clavus and outer portion of the corium. Head, eyes, antenne, and rostrum as in 
M. thripiformis. Pronotum hollowed at the sides, the anterior lobe smooth, the posterior lobe trans- 
versely rugulose. Orifice of the metastethium transverse, curving forward externally. 
Length 34-4 millim. (¢ 2.) 
Hab. Panama, Volcan de Chiriqui 2000 to 8000 feet (Champion).—BraziL, Rio 
Janeiro !~4, 
Eighteen examples. Very like If. thripiformis, but with the third antennal joint 
constantly black at the apex, and the corium usually black, rarely with an indistinct 
paler vitta down the shining outer portion. The eyes, as in that species, are large, 
rounded, and coarsely faceted in the male. In one specimen, apparently immature, the 
head and pronotum are piceous and the femora reddish. The type, now before me, is 
female, not a male as stated by both Stal and Reuter. 
6. Macrotrachelia opacipennis, n. sp. (Tab. XIX. fig. 20, ¢.) 
Moderately elongate, narrow, subfusiform, clothed with a few scattered hairs, shining, the elytra opaque, the 
outer margin of the cuneus excepted ; black, the third antennal joint ochreous, the membrane narrowly 
whitish externally ; the elytra with fine lines of glistening silvery pubescence—one down the clavus, one 
along its inner margin, and two down the outer part of the corium, the latter united posteriorly and 
continued as a single line on the cuneus,—the posterior lobe of the pronotum and the scutellum also with 
a little scattered silvery pubescence. Head smovth, the eyes small; antennz stout, rather short, joints 3 
and 4 more slender than 2, 3 twice as long as 2 and slightly shorter than 4. Rostrum nearly reaching 
the anterior coxe. Pronotum hollowed at the sides, the anterior lobe smooth, the posterior lobe trans- 
versely rugulose. Orifice of the metastethium transverse, becoming a little curved outwards. 
Length 33 millim. ( 9.) 
BIOL. CENTR.-AMER., Rhynch., Vol. II., Apri? 1900. 41 
