DYTISCIDiE, GYRINID2E. 
Ins . 41 
Noterus granulatus, Regimbart, l. c. p. 225, China. 
Hydrocanthus micans , Wehncke, /. c. p. 149, Addah, West Africa ; H. 
gracilis , Kolbe, l. c. p. 400, Madagascar. 
Canthydrus bisignatus, maculatus, Jcoppi, Addah, West Africa, p. 148, 
and javanus, Java, p. 149, Wehncke, 1. c. ; O. serialis , Fauvel, Rev. d’Ent. 
ii. p. 336, Noumea, New Caledonia. 
Laccophilus assimilis, Rdgimbart, l. c. p. 226, Sumatra, J ava ; L. semi - 
niger, Fauvel, l. c. p. 337, Kanala, New Caledonia ; L. lateralis , Horn, 
l. c. p. 282, pi. ix. fig. 3, Arizona. 
Lacconectus ritsemce , Regimbart, l. c. p. 229, Java. 
Jlhantus aluiaceus , Fauvel, l. c. p. 343, New Caledonia. 
Platynectes procerus , Regimbart, l. c. p. 229, Java. 
Copelatus elongatus , Kolbe, l. c. p. 411, Madagascar ; C. hcemorrhoidalis , 
Aru, p. 229, javanus , Java, p. 230, melanogrammus , Timor, p. 231, and 
fragilis , Java, p. 232, Regimbart, l. c. 
Gybister sumatrensis, id. 1. c. p. 233, Sumatra ; C. convexisculus , Kolbe, 
l. c. p. 420, Madagascar. 
Trogus punctipennis, Taschenborg, Z. Naturw. lvi. p. 176, Socotra. 
Hydaticus sellatus, Regimbart, l. c. p. 233, Celebes; II. concolor and 
ornatus , Kolbe, l. c. pp. 414 & 415, Madagascar. 
Graphoderes occidentalism Horn, l. c. p. 281, California, Washington 
Territory. 
Gyrinim:. 
Regimbart, M. Essai monographique de la famille des Gyrinidce. 2 
partie. Am. Soc. Ent. Fr. (6) iii. pp. 121-190, pi. vi. 
The paper commencesfwith a description of the maxilla (composed of 
basal joint, stipes, triangular plate, squama, inner and outer lobes, mala 
interna and mala externa, and maxillary palpus) aud of the front legs in 
the Dytiscidce and Gyrinidce. The second family of the Gyrinidce (the 
Gyrinini) is then discussed, including only the two genera Aulonogyrus , 
Motsch., and Gyrinus, Geoflir., the species being fully described. The 
platejllustratesfgeneric details. The following known species are illus- 
trated or specially noticed: — A. spylendidulus, Aub<5, figs. 73 & 78, 
concinnus , Klug ( —striatus , Aube, nec Fabr.), figs. 71 & 80, caffcr , Aubd 
(? =: Jlavipes , Boh.), Gyrinus minutus , Fabr. (= rocJcinghamensis , Lee.), 
urinator , 111., figs. 65 a-e & 72, fraternus , Coup., fig. 82, aquiris, Lee. 
(=. limbatus, Aube), fig. 83, plicifer , Lee., fig. 84, elongatus , Aube, fig. 85, 
caspius, Menetr. (= distinctus and libanus , Aube, and colymbus, Erichs.), 
bicolor , Fabr., fig. 86, nitidulus , Fabr., fig. 87, convexiusculus, Macl. (= 
nitidulus , p. Aube), fig. 88, curtus , Motsch. (= japonicus, Sharp), 
dejeani, Brulle (= ceneus, Aube), pernitidus , Lee., fig. 74, marinus , Gyll. 
(= opacuSm Sahib., and ceneus , Thoms.), fig. 89, pectoralis , Lee., p. 90, 
borealis , Aube, fig. 76, parcus , Say (= chilensis, Aube), ovatus, Aube, 
fig. 93, gibbus , Aube (= apicalis , Sharp), fig. 92, crassus , Aube, fig. 95, 
and chalybceus , Perty, fig. 96. 
. Les Gyrinides d’Europe. Mem. Soc. L. N. Fr. 1883, pp. 107-120. 
15 species described, belonging to 2 genera. 
