1920. J 



223 



Six specimens, vavviiTg in the colour of the under surface and of the 

 tip of the antennae. Closely related to H. gracilis Balj, from Chiriqui, and 

 separable therefrom by its smaller size and shorter prothorax, the sides of 

 which are deeply excavate to near the apex. Three species of the genus 

 have been described from Central America— two from Chiriqui and one 

 from Vera Paz. 



Cephalodonta tetrncantha, n. sp. 



Elongate, the elytra subparallel, dilated at the base and apex ; testaceous, 

 shining, the eyes, the antennal joints 8-11, the prothorax with a faint transverse 

 mark at the base, the elytra with a small oblique patch at the sides before the 



middle, two short indeterminate 

 streaks on the disc below this, and 

 the apical angular dilatation, and 

 the under surface in great part (the 

 basal half of the abdomen ex- 

 cepted), black or piceous, the tarsi 

 ^lililltly infuscate. Head smooth, 

 fnveate in the centre above; an- 

 tennae more than one-half the 

 It-ngth of the body, slender, filiform, 

 joints 8-11 thickened, 3-5 elongate, 

 siiheqnal, 3 nearly as long as 1 and 

 2 united. Prothorax transverse, 

 subquadrate, sinuously narrowed 

 from the middle forward, the an- 

 terior angles produced into a blunt 

 tooth in front ; the upper surface 

 sparsely foveolato-punctate, trans- 

 versely grooved at the base. Elytra 

 very elongate, the humeri greatly 

 swollen and produced into a long, 

 sharp, outwardly-directed spine, 

 the apical dilatation acutely trian- 

 gular and directed backward; the 

 iqjper surface with regular rows 

 of coarse, closely-placed, deep^ 

 foveiform punctures, the fifth 

 interstice (fourth of Baly) costate and broader than the others. Ventral 

 .surface almost smooth. Legs elongate ; anterior and intermediate tibiae 

 thickened at the apex within, the anterior pair armed with a small tooth 

 towards the tip. 



Length 74, breadth at middle of elytra 2!, at apex of ditto 3 J mm. 

 Hah. Costa Rica, Cascajal (C. II. Lanl-ester : l.iv.l920). 

 One specimen, taken on the wing-, presented to the British Museum 

 on August 27th. This remarkable insect is related to C. fcrox Baly 

 from Chontales (figured in Biul. Centr.-Am., Col. vi, 2, t. 3, lig. 1), 



Cephalodonta tetracantha riiaaipion. X8. 



