192 gilbert] j. arrow. 



and distinctly bilobed, the forehead is rugosely punctured, the pronotum strongly 

 and irregularly, the elytra more finely and closely punctured, and the pygidium still 

 more so. 



There is considerable resemblance to L. denticvlata, BL, from Martinique, of which 

 M. Lesne has kindly sent me a co-type for comparison, but the new species is less 

 narrowly elongate, the head is relatively narrower, the forehead more coarsely and 

 rugosely punctured, and the sides of the prothorax are less distinctly crenulated. 

 In size, colour and general appearance it also resembles the Mexican L. anodentata, 

 Bates, but it is not hairy above. It is also readily distinguishable by the bilobed 

 clypeus. 



In the male the club of the antenna is as long as the entire footstalk, in the female 

 about as long as the scape. In the latter the hind tarsi are very short. 



Lachnosterna acinosa, sp. nov. (fig. 1,/). 



Brunnea vel ruf o-brunnea, capite et pronoto f uscis, breviter griseo-setosa, pruinosa, 

 sed capite, pronoti parte antica, pygidio pedibusque nitidis, metasterno dense flavo- 

 viUoso ; oval is, convexa, capite hand lato, clypeo brevi, crebre punctato, excavato, 

 margine vix exciso, fronte grosse et rugose punctata, tumida ; pronoto grosse 

 inaequaliter punctato, punctis setis erectis brevibus et longis intermixtis instructis, 

 lateribus medio angulatis, vix crenulatis, hand arcuatis, angulis anticis et posticis 

 fere rectis, anticis autem leviter acuminatis ; scutello elytrisque minute et crebre 

 punctatis, costa suturali aliaque discoidali vix perspicua ; pygidio nitido, subrugose 

 punctato ; antennis 10-articulatis, clava flava ; pedibus utriusque sexus sat 

 gracilibus. 



(J, Abdomine medio excavato, segmento penultimo ventrali medio dense spinoso. 



Long. 17-19 mm. ; lat. max. 9-10 mm. 



Trinidad (F. W. Urich). 



This is closely related to the Mexican species L. longipilosa and misteca, of Bates, 

 differing from them most obviously in having the pygidium shining, instead of prui- 

 nose. As in those two species the upper surface has both a bluish bloom and a 

 clothing of fine setae, but the bloom is absent from the head and the anterior part 

 of the pronotum. In the male sex the group is also characterised by the hollowed 

 ventral surface of the abdomen and a peculiar spine-studded area in the middle 

 of the penultimate segment. 



The head is rather small, the clypeus scarcely notched, and the forehead rugosely 

 punctured. The pronotum is irregularly punctured and bears moderately long 

 erect hairs intermixed with shorter setae. The elytra are rather finely and closely, 

 the pygidium more coarsely, punctured. The antennae are 10-jointed and, like 

 the slender legs, differ little in the two sexes. 



Lachnosterna dilemma, sp. nov. (fig. 1, a, I, m). 



Nigro-picea, corpore subtus paulo rufescentiore, ubique subtHiter dense griseo- 

 sericea ; ovata, convexa, creberrime punctulata, capite haud magno, grosse et 

 confluent er punctato, clypeo brevi, margine rotundato, reflexo ; pronoto dense 

 minute punctato, angulis anticis paulo acutis, posticis obtusis ; scutello paulo 

 minus dense punctato ; elytris aequaliter dense punctatis, postice setis erectis parce 



