GALERUCINE BEETLES — BLAKE 75 



Other localities: Escocia (Costa Rica?), Nevermann; Piedras 

 Negras, Costa Rica, Schild and Burgdorf. 



Remarks: The extraordinary development of the antennae, head, 

 and pronotum in the male bewilders a taxonomist trying to place this 

 beetle in a genus. The excavation of the head and abnormal antennae 

 are suggestive of Cerotoma, but the depressed pronotum, the notched 

 middle tibiae in the male, and the Lwperus-Yike. shape place it near 

 Phyllecthrus. It deserves generic standing. Jacoby describes the 

 Nicaragua and Panama specimens as having four pale basal antennal 

 joints in the male. In the specimens I have examined from Costa 

 Rica, only three basal joints are pale in the male and only the first 

 two in the female. Otherwise the description fits. 



LeptonesioteSf new genus 



Elongate oblong oval, glabrous and without conspicuous punctation, 

 the head with well-marked frontal tubercles, with a short carina 

 between the antennal sockets, jaws large; antennae 11-jointed, not 

 extending much below the middle of the the elytra, in the male, joints 

 10 and 11 enlarged, joint 3 barely twice as long as joint 2 and a little 

 shorter than joint 4, joints 3-9 subequal. Prothorax a little wider 

 than long with slightly curved sides, somewhat narrowed towards 

 base, disk convex, without depressions. Elytra a little broader 

 behind, the humeri well developed with an intrahumeral sulcus. 

 Epipleura extending to about the middle of the elytra; anterior coxal 

 cavities open ; in the male a thickening of the front tibia, the first joint 

 of the front tarsi short and thick with the undersm"face having a flat 

 tympanum-like appearance; middle tibiae with a notch on the inner 

 margin near apex; hind femora much enlarged but narrowed at apex, 

 no apical spine discernible, posterior first tarsal joint longer than the 

 rest together; claws appendiculate. 



Type of genus: Diabrotica q/anospila Suffrian. 



Remarks: The name is derived from the Greek "leptos," delicate, 

 and "nesiotes," islander. 



Leptonesiotes cyanospila (Suffrian) 



Figure l,e 



Diabrotica cyanospila SufiFrian, Arch. Naturg., vol. 33, No. 3, p. 313, 1867. 



About 5.5 mm. in length, elongate oblong oval, shining, the elytra 

 conspicuously punctate, yellow (? reddish in life) with dark head and 

 dark humeral and apical spot on each elytron shining with a purplish 

 or violaceous lustre, last two abdominal segments deep violaceous, the 

 femora and tibiae also dark, tarsi reddish brown, antennae pale, and 

 in the male with the two distal joints enlarged, in the male also the 

 middle tibiae notched near the apex. 



453666 — 68 3 



