602 STAPHYLINIDA. 
should include Sunius bidens, S. bispinus, S. spinifer, S. celatus, S. palpalis, S. confinis, 
S. peltatus, and S. catena, Sharp; 8S. bipunctatus, S. hybridus, S. stigma, and S. nevius, 
Er. ; and, I believe, also Sunides boreaphilides, Motsch., though this insect is placed in 
the Munich Catalogue in the genus Lithocharis. Although I am not at present able 
to accept Sunides as a genus distinct from Dibelonetes, yet it forms a distinct section. 
§ 1. Thorax small, subovate ; right mandible bidentate (Dibelonetes). 
1. Dibelonetes biplagiatus. (Tab. XV. fig. 20.) 
Dibelonetes biplagiatus, Sahl. Act. Soc. Fenn. 11. 1847, p. 792°; Solsky, Hor. Soc. Ross. viii. p. 809 *. 
Hab. Guatrmata, Zapote, Pantaleon, San Isidro, Las Mercedes, Volcan de Atitlan 
2500 to 3500 feet, San Gerdénimo (Champion).—Sovutu America, Peru ?, Brazil !. 
This species is placed in the Munich Catalogue as a synonym of Sunius bipunctatus, 
Er., a Colombian insect. There are, however, numerous closely allied species of this 
genus, and it is by no means clear to me that Erichson’s description really refers to our 
insect ; so I have followed Solsky’s example, and used Sahlberg’s name. The species 
is very variable in the dark markings, and I am not able to separate the Guatemalan 
examples by any good character from individuals captured at Rio Janeiro by Sahlberg 
and others. 
2. Dibelonetes fragilis. 
Elongatus, angustulus, testaceus ; elytris nigro bipunctatis, abdomine ante apicem nigro variegato. 
Long. 52 millim. 
Hab. Panama, Volcan de Chiriqui 2000 to 3000 feet (Champion). 
Antenne very pallid and very slender, the terminal joints slightly enlarged. Labrum 
in the middle with two short teeth. Head slender, much narrowed behind the eyes, 
reticulate-strigose. Thorax slender, much longer than broad, much narrowed towards 
the front, sculptured like the head. Elytra long and narrow, much longer than the 
thorax; the punctuation deep and distinct, and rather coarse; with an oval black spot 
behind the middle of each. Hind body slender and elongate, distinctly pubescent, very 
indistinctly punctured, the penultimate segments infuscate. Underside of the head with 
only very few distant punctures. Last ventral segment of male deeply and broadly 
excised. 
Closely allied to D. biplagiatus, but of more slender form, with shorter teeth to the 
labrum, and narrower head and thorax. We have received four examples in very bad 
preservation; they show that the black marks are variable, as is also the case in 
D. biplagiatus. | 
