628 RHYNCHOPHORA. 
and brown intermixed. Head densely punctate, the eyes transverse and narrowly separated; rostrum 
short and stout, almost straight, thickly punctate (except along the middle), smoother in the Q, the 
antenne inserted midway, joint 2 of the funiculus shorter than 1, 3-7 short, widening outwards, the club 
ovate. Prothorax transverse, rounded at the sides anteriorly, constricted and much narrowed in front, 
deeply bisinuate at the base ; densely, confluently punctate. Elytra rather long, convex, one-half wider 
than the prothorax, subparallel in their basal half; seriate-punctate, the interstices somewhat convex, 
alutaceous, and sparsely granulate. Beneath shining, sparsely, coarsely punctate ; fifth ventral segment 
of the ¢ slightly depressed in the middle behind, the depression limited on each side by a few narrow 
scales. Legs short ; anterior femora sublinear, compressed towards the base, and obsoletely dentate, the 
other femora with a short tooth. 
Length 43-53, breadth 21-22 millim. (¢ 9.) 
Hab. Guatemaa, Cerro Zunil, Purula ( Champion). 
Five specimens from the Pacific, and one from the Atlantic, slope. The sharply- 
defined small white spots on the elytra, which are clustered into a transverse fascia 
towards the apex, the oblong, alutaceous, granulate elytra, &c., readily distinguish 
A. leucospilus. The spots are reduced in size in the single example from Purula. 
SEMNORRHYNCHUS. 
Semnorhynchus, Faust, Stett. ent. Zeit. 1896, pp. 52, 69. 
Faust referred a single species from Venezuela to this genus, which is represented 
by four nearly allied forms in Central America. ‘The following are their chief 
characters :— 
Rostrum short, almost straight, and widened towards the base and apex; eyes distant, coarsely facetted ; 
prothorax arcuately produced in front (the head scarcely visible from above), bisinuate at the base, with 
feebly-developed ocular lobes ; scutellum small, but prominent ; elytra slightly wider than the prothorax, 
with the alternate interstices sometimes a little raised, the tenth row of punctures abbreviated ; meso- 
sternum broad, raised, and prominent, angularly or arcuately emarginate ; metathoracic episterna broad, 
parallel-sided, uniseriate-punctate ; ventral segments 3 and 4 short, together very little longer than 2 ; 
legs short ; femora feebly unidentate. 
These insects are all of small size and oblong-ovate form, with the vestiture of the 
elytra rather dense or condensed into irregular markings. The mesosternum and 
rostrum are shaped very much as in Gasterocercus and its allies. | 
Q 1. Elytra with the alternate interstices set with short erect scales. 
1. Semnorrhynchus planirostris, sp. n. (Tab. XXXL fige. 1, 1a.) 
Oblong-ovate, convex, black, the antenne ferruginous ; densely clothed with intermixed pale brown, white, 
and blackish scales—the white scales condensed into two fascie or @ common, incomplete, X-shaped 
patch on the elytra, the dark scales mostly erect, setiform, and clustered into two streaks on the disc of 
the prothorax and two spots at the apex, and arranged in an interrupted line on each of the alternate 
interstices of the elytra; the tibie fusco-annulate at the base. Head densely, rugulosely punctate, the 
eyes coarsely facetted and moderately distant ; rostrum very short and stout, almost straight, widening 
outwards, rugosely punctate to the tip in the g, more sparsely punctured and shining in the 2, the 
antenne inserted towards the base, joint 2 of the funiculus short, 3-7 transverse, widening outwards, 
the club ovate, blunt at the tip. Prothorax almost as long as broad, constricted and much narrowed in 
front, arcuately produced at the apex, deeply bisinuate at the base ; coarsely, closely punctate. Scutellum 
