A472 RHYNCHOPHORA. 
5. Gerstaeckeria mutillaria. (Tab. XXIII. figg. 8, 8 a.) 
Acalles mutillarius, Gerst. Stett. ent. Zeit. 1860, p. 392°. 
Hab. Mexico! (Mus. Berol.). 
A very remarkable species, perhaps mimicking a J/utilla, densely squamose and 
setose, the vestiture yellowish-white, except that the elytra have a very broad, common, 
angulated, black fascia below the base (extending to beyond the middle), and a large, 
common, rounded, subapical black spot. Our figure is taken from the type belonging 
to the Berlin Museum. 
ACALLES. 
Acalles, Schénherr, Cure. Disp. Meth. p. 295 (1826) ; Gen. Cure. iv. p. 325; Brisout, Ann. Soc. 
Ent. Fr. 1864, p. 441; Lacordaire, Gen. Col. vii. p. 94; Leconte, Proc. Am. Phil. Soc.-xv. 
p- 240 (part.). 
Echinodera, Wollaston, Cat. Canar. Col. p. 298 (1864). 
This genus—the type of which is A. apicalis, Boh., from Cuba—includes a large 
number of Palearctic forms, and it is also well-represented in several of the Atlantic 
islands, the Hawaiian Is., New Zealand, &c. The various species from Central America 
now added differ a good deal inter se, but as they do not exhibit any definite structural 
peculiarities, they can remain for the present under Acalles. In all of them the pro- 
thorax is truncate or hollowed in the middle at the base ; the scutellum is invisible; the 
mesosternum is prominent, and semicircularly emarginate in front ; the metasternum is 
very short ; and the metathoracic episterna are almost or quite covered by the inflexed 
margins of the elytra. The second ventral segment is often more or less connate with 
the first, and as long as or longer than the third and fourth united, these latter being 
sometimes very short *. The tarsal claws are minute and narrowly separated in the 
smaller forms. A. rugirostris has the antenne inserted towards the tip. 
Species large, oblong-ovate in shape, with the antennez inserted beyond the middle 
of the rostrum, the prothorax much constricted in front, the elytra broadly 
produced at the apex, and the femora unarmed . . . . »~ « « . . No.l. 
Species moderately large, broad-ovate in shape, with the femora dentate - . . « No.2. 
Species smaller, oblong-ovate in shape, with tuberculate or nodose elytra, resembling 
the smaller Tylodinus. 
Femora, or at least the anterior pair, dentate . . ... =... . . . . Nos. 3-5. 
Femoraunarmed. . . . . . . soe ew ew ee ew we . 6Nos. 6-9. 
Species small, oval in shape, with the sides of the prothorax forming an almost 
continuous outline with those of the elytra, the femora dentate. . . . . . No. 10. 
Species very small, oblong-ovate or ovate in shape, with the prothorax more or less 
rounded at the sides and the elytra oval. 
Femoradentate . 2... 2. 1... ee ee ee ee ee ee) «Nos. 11, 12. 
Femoraunarmed. . 2. 2...) we ee ee ee ww es) Nos, 18-16. 
* In the Cuban A. apicalis the second ventral segment is about as long as the third and fourth united, and 
the sutures are deep and straight. 
