AULEUTES.—PERIGASTER. 151 
Hab. Nicaracua, Chontales (Janson). 
Very like the N.-American A. nebulosus (Lec.), but smaller and duller, the prothorax 
without tubercles and more finely punctate. ‘The fifth ventral segment is unim pressed. 
The mesosternal excavation is limited on each side by a faint ridge. One specimen. 
Sect. PHYTOBII. 
Phytobii, Dietz. 
DIETZELLA, nom. nov. 
Celogaster, Schénherr, Gen. Cure. iv. p. 588 (1837) ; Lacordaire, Gen. Col. vii. p. 208; Leconte, 
Proc. Am. Phil. Soc. xv. p. 282 (part.); Dietz, Trans. Am. Ent. Soc. xxiii. p. 455 (nee 
Schrank, 1780). . 
Dietz restricts Calogaster to two N.-American species (neither of which I have seen), 
and Ceuthorhynchus sertuberculatus, Boh., evidently ought to be included in the same 
genus. Its cl.ief characters are, the stout, moderately long rostrum, with deep, parallel 
scrobes, the 6-jointed funiculus, the prominent supra-orbital ridges, the well-developed 
ocular lobes of the prothorax, the unarmed femora, and the strongly toothed tarsal 
claws. ‘The genus belongs to the “‘ Phytobii spurii” of Dietz. 
1. Dietzella sextuberculata. (Tab. IX. fige. 4, 4a.) 
Ceuthorhynchus sextuberculatus, Boh. in Schéuh. Gen. Cure. vii. 2, p. 131°. 
Hab. Mexico ! (Truqut, in coll. Fry), Xucumanatlan in Guerrero (H. H. Smith). 
We have received a single specimen of this species from Guerrero, agreeing with 
the type communicated by Dr. Aurivillius, and there is also an example of it in the 
Fry collection in the British Museum ; they are probably all of the female sex. 
PERIGASTER. 
Perigaster, Dietz, Trans. Am. Ent. Soe. xxiii. p. 458 (1896). 
The single species placed under this genus has the characters assigned to Perigaster 
by Dietz, except that the tarsal claws are toothed* as in Dietzella (Celogaster) and 
the supra-orbital ridges are wanting. The rostrum is short and stout, with narrow 
oblique scrobes; the funiculus is 6-jointed; the eyes are rather prominent; the ocular 
lobes of the prothorax are almost obsolete; the anterior coxe are well-separated ; and 
the rostral canal does not reach the mesosternum. 
* In the N.-American Pelenomus cavifrons, Lec. (several specimens of which have been sent me by 
Mr. Wickham), the tarsal claws have a short acute tooth, a character overlooked by both Leconte and 
Dietz. 
