404 SUPPLEMENT. 



25 (a). Lachnosterna parilis. 



L. rorulentcB affinissima et similis, differt corpore magis elongato et supra crebrius et profundius punctato, 

 minime pruinoso. 



<$ . Pygidium, calcaria postica et venter sicut in L, rorulenta 3 . 



2 ■ Pygidium sicut in $ subconvexum, integrum, glabrum, distanter punctatum. Venter sicut in L. rorulenta $ . 

 Long. 23-25 millim. 



Hab. Mexico, Temax in North Yucatan (Gaumer). 

 Three males and one female. 



26 (a). Lachnosterna gaumeri. 



Elongato-oblonga, sat gracilis, fulvo-testacea, supra glabra ; caput sat latum, discrete punctatum. clypeo brevi 

 utrinque rotundato, margine mediocriter reflexo antice medio sinuato ; tborax medio rotundato-dilatatus, 

 angulis anticis et posticis obtusis sed distinctis, regulariter et distanter punctatus ; elytra mediocriter 

 punctata, costa suturali valida sed prope scutellum obsoleta. Subtus pectus longius tenuiter pubescens. 



c?. Pygidium parum convexum, distanter punctatum, punctis breviter piliferis. Venter medio eoncavus, 

 sparsim subtiliter setifero-punctatus, segmento 5° elongato, simplici, 6° fere piano apice punctato et longe 

 setoso. TibiEe posticas calcari inferiore brevi connato. Ungues dente inferiore brevi acuto infra medium 

 sito, dente basali rotundato parum elevato. Antennarum clava brevis. 



$ . Pygidium elongato-triangulare, parum convexum, distanter punctatum, punctis breviter piliferis. Venter 

 convexus, segmento 6° valde convexo et grosse setifero-punctato. Tibiae postica? calcari inferiore normali 

 articulato. Ungues dente inferiore longiore (apicali paullo tantum breviore) et supra medium sito. 



Long. 15-17 millim. 



Hab. Mexico, Temax in North Yucatan (Gaumer). 



Eight examples. The sexual difference in the dentition of the claws is greater than 

 in any other species of Lachnosterna I have examined, the lower tooth being very curved 

 and situated above the middle in the female, whilst it is short and straight, and placed 

 nearer the base than the middle, in the male. The species is also remarkable in 

 Section IV. for its elongate, slender form. 



Lachnosterna submetallica (p. 204). 



To the localities given, add : — Mexico, Atoyac (Flohr). 



57 (a). Lachnosterna yncateca. 



I tristi (Fabr.) proxime affinis et quoad elytrorum sculpturam simillima, sed differt inter alia thorace sparsius 

 et rigidius piloso. Pulvo-castanea, capite et tborace rufioribus interdum fere nigns; clypeus subsemi- 

 circularis, margine toto alte reflexo, punctato, fronte scabrosa ; tborax post medium valde dilatatus, margine 

 (grosse crenulato) lateral! antice sinuato, angulis anticis acutis, posticis obtusis, sat grosse et dense punc- 

 tatus, erecte rigide piloses ; elytra glabra, eutoequaliter crebre et forte punctulata medio suturam versus 

 rugulosa. Ungues dente inferiore infra medium sito, sat robusto, brevi, acuto, dente basali nullo. 

 tf. Pygidium mediocriter convexum, grosse punctatum, pilis erectis valde elongatis. Venter medio sublsevis 

 politus, segmento 5° postice medio crebre setifero-punctato, 6° transversim concavo, punctato et longius 

 piloso. 



Long. 13-14 millim. tf . 



Hab. Mexico, Temax in North Yucatan (Gaumer). 

 Six examples, all males. 



