48 PEOCBEDINGS OF THE NATIONAL MUSEUM vol.80 



This species is allied to insulana Gahan, described from Jamaica, 

 but it differs from that species in having the pronotum nearly im- 

 punctate, the femora obtusely bispinose at apices, and the tibiae 

 longitudinally carinate. 



This species is named in honor of R. H. Van Zwaluwenburg, who 

 has very greatly increased our knowledge of the fauna of Porto 

 Rico by his careful and energetic collecting and has carefully studied 

 some of the difficult genera of the family Elateridae. 



HETERACHTES FULGENS, new species 



Narrowly elongate, subcylindrical, feebly flattened above, and 

 strongly shining; elytra whitish yellow, and each elytron narrowly 

 margined dark brown, prothorax slightly darker; antennae, legs, 

 and underside of body (except the prosternum) reddish. 



Head very sparsely, irregularly punctate, vaguely rugose, glabrous, 

 front short, strongly transverse, narrowly, deeply, transversely 

 grooved behind the epistoma, the groove extending on each side along 

 the inner margin of the eyes to near the antennal cavities, a narrow, 

 longitudinal, median groove extending from epistoma to vertex, 

 surface strongly, broadly concave between the antennal tubercules, 

 which are rather strongly elevated; eyes deeply emarginate, and 

 separated from each other on the top by four times the width of the 

 upper lobe. Antenna twice as long as the body, sparsely punctate, 

 sparsely clothed with short, whitish pubescence, with numerous long, 

 erect hairs on underside of joints, which are unarmed at apices; 

 basal joints flattened, and longitudinally carinate; first joint robust, 

 moderately clavate, considerably shorter than the third joint, which 

 is slightly longer than the fourth; eleventh joint slightly longer 

 than the tenth. 



Pronotum considerably longer than wide, and subequal in width 

 at base and apes ; sides parallel, sinuate, and feebly constricted near 

 base and apex; disk vaguely uneven, broadly, feebly, transversely 

 concave anteriorly, deeply transversely depressed near base; surface 

 smooth and glabrous, except narrowly along the base, where it is 

 finely, densely punctate, and sparsely clothed with fine, short, pubes- 

 cence. Scutellum elongate, curvilinear, and densely clothed with 

 recumbent, white pubescence. 



Elytra two and one-half times as long as pronotum, and at base 

 distinctly wider than pronotum at middle; humeri strongly elevated; 

 sides nearly parallel from base to near the tips, which are separately, 

 transversely truncate, with a moderately long, obtuse spine at lateral 

 margin; surface smooth and glabrous, except for two longitudinal 

 rows of very widely separated punctures on each elytron, and a long, 

 stiff, erect, yellowish hair arising from each puncture. 



