128 RHYNCHOPHORA. 
LOGANIUS. 
Loganius, Chapuis, Syn. Scol. p. 52 (Mém. Soc. Liége, 1873, p. 260). 
The only point which I can find to. separate Loganius from Ceratolepis is the 
structure of the antennal club, which in Loganius is regularly ovate, with the lateral 
borders almost alike in curvature, and with the funiculus attached at the basal point. 
Its surface shows signs of one or two curved sutures crossing it, less evident in the 
Central-American species than in the type, LZ. flavicornis. In that insect the two 
curved concentric sutures are very distinct, perhaps owing to the pallid colour of the 
club and its thin pubescence. These sutures appear to be quite superficial, for in 
L. panamensis the single suture which extends from one side to the other appears in 
a balsam-mounted specimen to reach to the middle only, as in Ceratolepis. These two 
genera may require to be united, or to be kept separate on other characters than 
that of the club alone; but to do this would necessitate examination of richer material 
than that available, and dissection of examples of each type species. In ZL. pana- 
mensis and L. exiguus, the funiculus is cirrate in both sexes, the cirri in the male 
being stouter and reaching to the apex of the antennal club, much finer and shorter 
than the club in the female. 
Two species of Loganius have been described—one, L. flavicornis, Chap., from 
Yewugnee the other, Z. jficus, Schwarz, from Florida. The latter, which has been 
placed provisionally only in this genus, I have not seen. 
1. Interstices of the elytra carinate . 2. 1. 1. 1 1 ee ee ew ee) 6 [flavicornis, Chap.] 
Interstices not carinate . . ww ewe we ee ee ee 
2. Form elongate, subcylindrical; base of the elytra brown . . . . . longicollis, sp. n. 
Form ovate or oblong-ovate; entirely black . . . . «. . © + « 38. 
8, Elytra pubescent ©. 2. 2 1 ee we ee ee we we panamensis, sp. n. 
Elytra glabrous . 6 6 6 ee ee ee ee ee ew ee tractus, sp. To. 
Elytra with seriate bristles towards apex. .« . - 6 + ee 8 ew 
4, Prothorax shining, simply punctured. . . «© ©. . + s + + + eaig“uus, Sp. n. 
Prothorax sericeous, closely strigillate between the punctures. . . . méinusculus, sp. n. 
1. Loganius longicollis, sp.n. (Tab. VI. fig. 1, antenna.) 
Oblongus, subcylindricus, nigro-piceus, prothoracis marginibus et elytrorum basi rufescentibus ; fronte fusco- 
villosa; prothorace latitudine longiore, subnitido, sat dense subtiliter punctato, linea media levi ; elytris 
ad basin subnitidis, punctato-striatis, interstitiis planis, angustis, punctatis, in declivitate seriato-setosis. 
Long. 2°5 millim, 
Oblong, subcylindrical, piceous-black, the anterior and posterior margins of the prothorax and the basal third 
of the elytra piceous-red. Front flattened, with close fuscous pubescence, vertex dull, punctured ; antenne 
piceous-red, cirri of the funiculus fine, club obovate, fuscous. Prothorax longer than broad, its base 
subbisinuate and not margined, the sides feebly constricted towards the apex; slightly shining, with 
close, rather fine punctuation, absent over a narrow median line and not stronger at the sides, the inter- 
spaces substrigose behind, reticulate over the apical part, which bears afew short hairs. Scutellum small, 
