Cyptocephala alvarengai, Rolston, 1986

Cyptocephala alvarengai , new species Figs. 1,8, 15, 18 - 20

Description. Light tan or pale green, usually with variable, vague patterns of fuscous and / or rufous punctures; some light green individuals conspicuously marked with much of head, a broad band connecting humeri, and apical part of scutellum rufous or rufously punctate; densely punctate spot on apex ofscutellum fuscousorcasta neous, occasionally reduced to a few punctures. Length excludinghemelytralmem brane 5.2 - 8.3 mm.

Lateral margins of juga parallel or subparallel between anteocularconcavityand smoothly arcuate apex ofhead.Antennaedark stramineousor lightgreen,apical 1/ 2 or less of segment 3 and all of segments 4 and 5 brown, castaneous or rufous; length of segments 0.3 - 0.4, 0.6 - 0.9, 0.75 - 1.0, 0.8 - 1.0, 0.85 - 1.0 mm. Rostral segments 2 4 about 1.1 - 1.5, 0.6 - 0.8, 0.6 - 0.8 mm inlength;last segment mostly black, reaching from posterior margin of metacoxae to posterior margin of sternite 3 (2nd visible). Width ofhead across eyes 1.5 - 2.0 mm, mesial length 1.4 - 1.8 mm; interocular width 0.95 - 1.20 mm; distance across ocelli 0.85 - 1.05 mm.

Anterolateral margins of pronotum weakly concave. Interstices between punctures often calloused between humeri, forming narrow, irregular band. Width of pronotum at humeri 3.3 - 4.7 mm, mesial length 1.3 - 1.9 mm.

Mesial stripe with few or no punctures often present on scutellum distally, ending atsmall, marginal cluster of fuscous or castaneous punctures. Basal width of scutellum 2.0 - 3.2 mm, length 2.1 - 3.1 mm; width at distal end of frena 0.36 - 0.42 of basal width. Coria rather uniformly punctate; membranes hyaline, or with mesial veins brown, or with prominent mesial vitta. Connexiva little or not at all exposed, im maculate or sordid to fuscous, usually with marginal, semicircular, pale macule.

Ventral punctation usually castaneous to fuscous with black dot at base of mesial trichobothrium of each pair. Lateral angles of sternites usually minutely marked with black.

Greatest width of each 9th paratergite nearly 1 / 2its greatest length ( Fig. 15). Basal plates convex but not tumescent, without umbo.

Anterior lobe of parameres terminating in acute cone, occasionally spinose; lateral lobesubacute or narrowly rounded apically ( Figs. 1, 8). Aedeagus as inFigures 19, 20. Distribution. Northeastern Brazil, states of Bahia, Ceara, Minas Gerais and Per nambuco.

Holotype. 6,labeled " Brazil: Pernambuco State, Petrolina , V- 1969. M. Alvarenga. " Deposited inMuseu Nacional, Rio de Janeiro .

Paratypes. Labeled as holotype (3986, 4122); " Brazil: Ceara State, Crato , 850 m, Serra do Araripe . V- 1 969, M. Alvarenga " (386,12); " Brazil, Bahia: Encruzilhada , 960 m, Nov. 1972, N. Alvarenga " (16, 1 Q); " Independencia , Brazil, Mann " (268); " Cor disburgo , Minaes Gerais , BRAZIL, 7 - 8 Nov. 19 - Cornell University Expedit, Cornell U. Lot 569 Sub 84 " (12).

Comments. The range of this species is not known at present to overlap that of any other spsecies of the genus. Of the other two congeners in South America, the known range of cogitabunda is considerably to the south and west, and the range of antiguensis apparently does not extend southward into that of alvarengai .

Etymology. This species isnamed forMoacir Alvarenga, one of the few recent and major collectors of South American insects.