94 
Psyche 
[April 
apical fourth; outer margin obsoletely crenate; disk sparsely 
punctured and pubescent; fifth interval with a fine carina from 
base nearly to apex; third interval not prominent at base; basal 
two thirds of four inner striae represented by irregular series of 
punctures; a faint alutaceous sculpture visible near the larger 
ones. Length 1.3-1. 4 mm. Width 0.45 mm. Holotype and 
three paratypes, Arimao River, Soledad, Cienfuegos, Cuba, Dec. 
3, 1926. 
One specimen, from the gravelly bank of a large brook, Nov. 
24, has the head less shining, the thoracic and elytral margins 
more clearly crenate, and the elytral striae longer; I have referred 
it to this species, but not as a paratype. With this exception, 
there seems to be no noteworthy variation. The form is almost 
exactly that of H. ccesa Lee. from which it differs chiefly as in- 
dicated in the key. In this, as in all the following species, no 
sexual characters have been noted, and the size is really remark- 
ably constant. The holotype, with the three of the other species, 
is in my private collection, and at least one paratype of each 
form described will be retained to lend to established students. 
Paratypes of all species will be deposited in the Museum of 
Comparative Zoology and the National Museum; of fiiiformis 
and simplex, in the American Museum. 
Helmis fiiiformis n. sp. 
Elongate, parallel, slightly depressed; dilute brown, with 
slaty tinges below and on elytral disk; head and pronotum dull 
black; antennae, tarsi and palpi yellowish rufous. Head opaque, 
moderately punctate and pubescent. Prothorax subquadrate, 
about as long as wide, widest one third from base, slightly nar- 
rowed at base and apex; side margins slightly crenate ; pronotum 
longitudinally impressed on median third, the impression in- 
dicated at base by a pair of minute carinae; pronotum also with 
a pair of complete, sublateral carinse paralleling the side margins 
anteriorly, but sinuate and slightly approaching the margins 
posteriorly, the distance between them being more than half 
the discal diameter; disk alutaceous or finely granulate, more 
distinctly so posteriorly, sparsely punctate and pubescent; elytra 
