OTIDOCEPHALUS, 239 
abundant, short, blackish, suberect setosity and scattered, decumbent, whitish hairs, these latter 
extending over the under surface and legs, the vestiture of the metasternal side-pieces very dense and 
white. Head densely punctate, the eyes moderately large and widely separated; rostrum short and 
stout, depressed at the base above, rugosely punctured and laterally sulcate; antennal club ovate. 
Prothorax convex, moderately long, narrowing from the middle forwards and also narrowed behind, 
coarsely, deeply, confluently punctate. Scutellum large. Elytra much broader than, and about two and 
one-half times the length of, the prothorax, broadly flattened along the inner portion of the disc, sub- 
parallel in their basal half, conjointly emarginate at the base, the humeri prominent, but obtuse; closely, 
confusedly punctate, the usual seriate coarser punctures barely traceable, the pectinate scales arranged 
somewhat in lines, which are here and there separated by small bare spaces. Fifth ventral segment 
feebly emarginate at the apex. Legs stout; femora each with a very small triangular tooth; anterior 
tibie strongly sinuate within. 
Length 8, breadth 34 millim. (¢.) 
Hab. Mexico (Mus. Brit.). 
This insect agrees with QO. vittatus, Horn (= Cycotida lineata, Pasc.), O. nivosus, 
Casey, O. wlkei, Horn, and 0. insignis, Casey, in being thickly clothed with radiato- 
pectinate scales * (fig. 84), and is nearest allied to the two latter (the others having 
vittate elytra), but differs in various details. The species mentioned are all from the 
Southern United States or Lower California, and OQ. vestitus is therefore probably an 
inhabitant of the northern part of Mexico. 
14. Otidocephalus dugesi, sp.n. (Tab. XIII. figg. 9, 9 a.) 
Elongate-ovate, robust, shining, nigro-eneous; thickly clothed with rather coarse, decumbent, grey or 
brownish-grey pubescence, which is absent from the five longitudinal series of rounded, sharply defined, 
bare spaces on each elytron, the scattered erect blackish sete arising from these portions of the surface. 
Head closely punctate, feebly sulcate between the eyes, which are large, somewhat widely separated, and 
not prominent; rostrum stout, slightly shorter than the prothorax, rugosely punctato-sulcate ; antenne 
with joints 2-7 of the funiculus decreasing in length, the club ovate. Prothorax subcylindrical, longer 
than broad, a little narrowed in front and behind, closely, irregularly punctate, with a more or less 
distinct, smooth, raised, median line. Elytra oblong, convex, much wider than the prothorax, the humeri 
rather prominent ; closely, finely, confusedly punctate, except upon the five series of smooth bare spaces, 
each of these with a single setigerous puncture. Legs moderately stout; femora each with a small 
triangular tooth ; anterior tibiae feebly sinuate within. 
Length 74, breadth 33 millim. ( 2.) 
Hab. Muxico, Guanajuato (A. Dugeés). 
Two specimens, sent us by Dr. A. Dugés in 1897, with the accompanying note :— 
“ Taken (with others) out of a large gall on a branch of an oak in the mountains, in 
company with some Cynipides of the genus Synergus, both probably inquilines.” 
The species may be readily identified by the five longitudinal series of rounded smooth 
spaces on each elytron, which are for the rest thickly pubescent and closely, con- 
fusedly punctate. 
15. Otidocephalus interruptus, sp.n. (Tab. XIII. figg. 10, 10a.) 
Elongate-ovate, robust, shining, piceous or rufo-piceous ; thickly clothed with long, rather coarse, brownish- 
grey, decumbent pubescence, which is absent from numerous small bare spaces on the elytra, the 
* The American authors describe these as “ tufted hairs.” 
