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312 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 37, NO.9 Type female, M. C. Z. no. 27680. Type locality.——Loma del Gato, Cobre Range, Oriente Province, Cuba, at about 3,000 feet elevation; collected July 3-7, 1936, by P.J. Darlington. Remarks.——This species lies between M. adustum Suffrian from Cuba and M. wolcotti Bryant from Haiti. It resembles the former in general coloration, having a pale apex to the elytra, but lacks the distinct elytral punctation in which the rows of punctures are entire. In this respect it resembles the Haitian species M. wolcotti, which is entirely dark, with dark legs and elytra. M. terminale, described by Horn from Florida, is identical in outward appearance with M. adustum and considered the same by E.A. Schwarz, and I synonymized the two at an earlier date. Dissection shows a slight difference in the aedeagus. Whether this indicates specific differentiation is a question only to be decided by breeding. The aedeagus of M. wolcotti is very similar to these two and drawings are here given of all three (Fig. 8). Unfortunately the only specimen known of M. xanthacrum is a female. These species are all very closely related and show the effects of isolation in the development of their small differences. Metachroma fenestratum, n. sp. Fig. 5 About 3 mm in length, oblong, lustrous yellowish or reddish brown with a dark vitta on each side of the thorax and a broad dark marking on the basal callosity of the elytron and below along the suture, and a fainter band running from about the middle of the side diagonally across to the suture; head and thorax indistinctly punctate; elytra with large striate punctures for a short distance below the basal callosities and in the intrahumeral sulci. Head with interocular space about half its width, smooth, in some specimens indistinct wrinkles as of obsolete punctures, the groove between the eyes and about antennal sockets deep. Antennae extending to the middle of the elytra; second joint longer than the third and five distal joints heavier and with dark apex. Prothorax rather narrow, considerably less than twice a broad as long, with curved sides and a sharp tooth at each corner; an indented line along basal margin and anteriorly behind the eyes; surface very shiny, only indistinctly and sparsely punctured; deep reddish brown with a dark stripe on either side. Elytra with small humeri and basal callosities and a deep intrahumeral sulcus; a line of indented punctures along base and down suture, and short rows of large punctures below the basal callosities and in the intrahumeral grooves, these rows becoming indistinct before the middle; surface very smooth and shiny; pale yellowish brown with dark markings in the middle of the base and below for a short distance along the suture, a darker band starting from the side at the middle and extending diagonally across to the suture, but becoming paler. Body beneath shining yellowish or reddish brown. Femora not toothed; claws with a long basal tooth. Length 2.8-3 mm, width 1.4 mm. Type male and 1 paratype, M. C. Z. no. 27681; 1 paratype, U.S.N.M. no. 58357. Type locality.——Yauco, Puerto Rico, collected June 15, 1934, by C. M. Matos (Stuart T. Danforth Collection). Remarks.——This is an unusually narrow species with markings similar to Metachroma ensiforme. The aedeagus, though not so narrow and sword-shaped, has a long acute tip but much broader and shorter behind the tip. Metachroma amplicolle, n. sp. Fig. 6 About 3 mm in length, oblong, shining, yellow or reddish brown with a dark spot on the occiput, a broad irregular band across pronotum, and a small spot at base of the basal callosity and below in the depression and on the edge, and in some specimens two spots at the middle, one on the side and the other on the edge; pronotum almost impunctate; elytra with striate punctation entire only in the two rows next to the suture. Thorax almost as broad as elytra. Head with interocular space less than half its width; eyes large; occiput and front distinctly but finely punctate, more coarsely in lower front; a median line between the tubercles and a groove about antennal sockets, a slight depression between the eyes; yellow-brown with a broad dark band down front. Antennae pale, extending to the middle of the elytra, the five distal joints heavier. Prothorax large and about as wide as elytra, not twice as broad as long, the sides arcuate; an indented line across the base and almost across the anterior margin,
