DASYDACTYLUS. 23 



18. Dasydactylus cyanopterus. 



Sanguineo-rufus, elytris caeruleis; antennis pedibusque nigris, his basi runs; abdominis apice nigrescente. 



Long. 7-8 millim. S £ . 

 Mas prothoraee magis convexo ; tarsis anticis villosis, f emoribus tibiisque asperatis. 



Hab. Mexico, Toxpam (SalU). 



Very nearly resembling Languria cyanipennis, Crotch ; similarly coloured, but more 

 cylindrical, and with the thorax more coarctate behind. The head and thorax are very 

 finely, rather closely, punctate, and often inclining to bluish ; the elytra are more distinctly 

 punctate than in L. cyanipennis, and have the interstices narrower and here and there 

 irregularly punctured. The males will be easily recognized by the characters given. 

 The apices of the elytra are very faintly denticulate (so as hardly to be thus termed) ; 

 yet this character, which may be seen in some specimens of both J), cyanopterus and 

 JD. sellatus, is important as confirming their relationship with the other species of this 

 genus. Four specimens. 



19. Dasydactylus sellatus. (Tab. I. fig. 14, $ .) 



Languria sellata, Crotch, Cist. Ent. i. p. 385 \ 



" L. angustatce proxima, sed capite, pedibus antennisque runs, his olava infuscata ; elytris cyaneis, fascia rufa 

 pone medium. Long. 3g~4 lin." 



Eab. Mexico 1 , Teapa (Edge, Salle), Tuxtla, Playa Vicente (Salle), Cordova (Edge) ; 

 British Honduras, R. Hondo (Blancaneaux). 



Var. Capite nigro. 



Hab. Mexico, Teapa (Edge). 



Bright ferruginous-red ; the tarsi black, the claw-joint and claw reddish ; the basal 

 third and tip of the elytra steel-blue ; the tip of the abdomen black ; the apical and 

 greater part of the preceding ventral segments also black. In several examples the 

 femora, tibiae, tarsi, and antennae are indistinctly clouded with bluish-fuscous. The 

 elytra are subulate ; their apices almost pointed and faintly serrate, but not denticulate ; 

 distinctly punctate, the striae so close as almost to be confused. The prosternal process 

 is margined and greatly cut out at the tip. The male characters are similar to those 

 of other species of Dasydactylus ; but the hairs of the tarsi in both this and D. cyano- 

 pterus, to which it is nearly allied, are fine and silky ; the femora and tibiae of the 

 front and middle legs are distinctly roughened. 



One specimen, apparently not otherwise different, but with the head black, was 

 captured by Herr Hoge at Teapa. 



20. Dasydactylus ventralis. (Tab. I. fig. 11, $ .) 



Languria ventralis, Chevr. Col. Mex. Cent. i. fasc. 4, no. 98 (1834) * (nee Langurites ventralis, Crotch, 

 Cist. Ent. i. p. 392). 



Nigro-piceus, viridi-aeneus, nitidus, subtus ruf o-piceus ; capite prothoraceque erebre minute punctatis, nitidis 



