194 LAMELLICOKNIA. 



elongata cseteris articulis conjunctis longior, articulis 5°-7 m brevissimis, intus acute productis. Clypeus 



transversus, margine antico alte reflexo medio leviter sinuato. 

 $. Pygidium medio prope apioem tuberculo valido compresso-conico. Venter medio glaber, segmento 5° 



postice (sicut lateribus) punctulato. Ungues omnes dente mediano elongato, curvato, a dilatatione basali 



distanti. 

 Long. 20-24 millim. 



Hal. Mexico, Puebla, Tuxtla, Chiapas (Salle), Las Vigas (Hbge) ; Guatemala, 

 Torola (Champion); Costa Eica (Van Patten). 



Belongs to the L. ravida group, of which it is the largest known member. L. dasy- 

 poda approaches nearest to L. macropliylla in pubescence ; but in the rather ample 

 sub semicircular clypeus it differs from all its allies. 



In the male the median tooth of the claws at its base forms part of the wide dila- 

 tation of the basal half of the claw, and is small, triangular, and acute ; the basal tooth 

 is not angular but gradually rounded, so that it appears separated by a considerable 

 interval from the median tooth ; the apex remains for a long distance free. In the 

 female the median tooth has the same position as in the male, but is much longer and 

 not greatly different in form from the apical tooth, from which it is separated by a much 

 shorter interval. In the other species of the group the form and position of the claw- 

 teeth are different, the basal tooth, especially in the male, being angular and separated 

 from the median tooth by a narrow cleft. 



A male from Tuxtla is figured. 



20. Lachnosterna polyphylla. (Tab. XI. fig. 5, s .) 



L. ravidce similis, sed valde differt antennarum clava valde elongata et quinque-laminata, oblonga, fulvo- 

 testacea, thorace rufo, nitido, fronte tboracisque margine antico longe erecte setosis ; clypeo parvo, antice 

 angustato, apice obtuse truncato angulis rotundatis, margine mediocriter reflexo vix sinuato, toto capite 

 confluenter punctato ; thorace medio modice dilatato, haud dense punctulato ; elytris ruguloso-punctulatis. 



3. Pygidium versus apicem subconice convexum, sparse (versus apicem longius et densius) pilifero- 

 punctatum. Venter medio depressus, nitidus sed pilosus, segmento 6° depresso, medio canaliculate, 

 longius et densius piloso. Calcaria postica libera. Ungues basi quadrato-dentati, dente mediano versus 

 basin curvato-inclinato, apicali longius libero ; intermedii <$ ungue exteriore difformi denteque mediano 

 valde elongato extruso. Antennarum clava pentaphylla, cseteris articulis conjunctis fere duplo longior, 

 articulis 4° et 5° intus paullo productis, acutis, 6° vix abbreviato, 7° paullo abbreviato et attenuato, 8°-10 m 

 aequalibus. 



Long. 16 millim. 



Hal. Mexico (Salle). One example, male. 



21. Lachnosterna heterophylla, 



L. pvlyphyllce proxime affinis, antennarum clava pentaphylla sed articulo 7° multo abbreviato. Fulvo-testacea, 

 nitida, tborace rufo ; clypeo paullo longiore, antice angustato, margine altius reflexo medio sat profunde 

 sinuato, supra concavo, punctato, medio laavi ; fronte thoracisque margine antico longe erecte setosis ; 

 tborace medio perparum dilatato, sparsim punctulato ; elytris ruguloso-punctulatis. 

 d . Pygidium regulariter convexum, glabrum, parum punctatum. Venter medio concavo depressus, erecte 

 pilosus, segmento 6° medio valde canaliculato. Calcaria postica libera. Ungues sicut in L. polyphylla, 



