200 PERCY SLADEN TRUST EXPEDITION 
very minutely and closely rugose-punctate, covered with very fine, short, pale pubescence, 
except the mesosternum. 
Loc. Aldabra: from “ Wilson’s Well,’ Takamaka, X.—XI. 1908 (Fryer). 
Madagascar. 
Subgenus BERosus, s. str., Ganglbauer, Kaif. Mitteleur., iv. 1, p. 220. 
4. Berosus bergrothi, Régimbart. 
Berosus bergrothi Régimbart, Bull. Soc. ent. France, 1900, p. 51, and Ann. Soe. ent. 
France, lxxii. 1903, p. 40; Alluaud, Liste Coléopt., p. 229; Kolbe, Abh. Senckenb. Ges., 
xxvi. 1902, p. 574. 
A large series of about 260 specimens, agreeing well with Régimbart’s description. 
But there are certain variations. Régimbart stated that the dark metallic patch on the 
disc of the prothorax is not divided by a pale median line: in a number of the specimens, 
however, it is narrowly divided, completely or almost completely. Some specimens have 
the anterior margin of the prothorax dark in the middle part, behind the head ; but this 
dark colour is not united to the front of the median patch, which never reaches either the 
front or hind margins. 
Three specimens exhibit more striking variation. In one of them, a @, the dark 
thoracic patch is reduced to two very small patches, completely separated and situated in 
the posterior part of the disc. In the two others, ??, the dark mark is entirely absent, 
the prothorax being uniformly pale: these also have the dark elytral marks much reduced, 
in one specimen practically absent. They show no signs of immaturity, the head being 
entirely dark bronze with metallic reflections, as in all other specimens. 
Régimbart also stated that the thoracic punctuation is not interrupted by a smooth 
median space: this is quite true in many specimens, but in some a slight indication of a 
median longitudinal smooth line can be seen with a high power. 
Judging by Régimbart’s descriptions (/.c.), this species must be closely allied to 
Berosus villosulus Rég. (Madagascar) and B. viticollis Boh. (S. Africa and Madagascar). 
Loc. Aldabra: Takamaka, X.—XI. 1908 (Fryer); 1895 (Voeltzkow). Madagascar. 
Votvuuus, Brullé*. 
5. Volvulus stagnicola (Mulsant). 
Brachygaster stagnicola Mulsant, Ann. Soc. Linn. Lyon (sér. 2), 1. 1853, p. 385, 
and Opuse. Ent., u. 1853, p. 177; Alluaud, Liste Coléopt., p. 229. 
Volvulus stagnicola Régimbart, Ann. Soc. ent. France, xxv. 1906, p. 267. 
Brachygaster denticulata Régimbart (nec Muls.), Ann. Soc. ent. France, lxxi. 1903, 
p. 41. 
Volvulus cupreus Régimbart, Bull. Soc. ent. France, 1900, p. 51; Alluaud, Lc. ; 
Kolbe, Abh. Senckenb. Ges., xxvi. 1902, p. 574. 
* The name Regimbartia is proposed for this genus, and the synonymy dealt with, by Zaitzev in his Cat. 
Hydrophil., Horze Soc. Ent. Ross., xxxviii. 1908, p. 362. 
