AMERICAN COLEOPTERA. 77 



second small, third a little longer, fourth as long as first, 4 — 11 gradually more 

 elongate. Eyes rather large, round and prominent. Tarsi slender, first joint on 

 each foot shorter than the second and about equal to the fourth. 



A. californicus Lee. — Pieeo-testaceous, sparsely clothed with greyish pubes- 

 cence. Head coarsely and densely punctured. Thorax a little longer than wide, 

 sides in front arcuate, posteriorly slightly sinuate, lateral margin rounded without 

 limiting edge, hind angles slightly divergent and with an extremely fine carina, 

 surface sparsely punctate in front and nearly smooth posteriorly. Elytra striate, 

 striae with coarse and deep, closely planed punctures, intervals finely punctulate, 

 the fifth subcarinate at apical third. Body beneath very sparsely punctulate. 

 Length .24 inch ; 6 mm. Tl. II, fig. 6. 



Of this insect we know the male only. The femtile probably does not 

 differ greatly. The general aspect is that of an elongate Cardiophorus. 



Occurs from San Diego to Owen's Valley, California ; but very rare. 



APL.ASTUS Lee. 

 The species have been so recently the subject of a review that I 

 merely repeat the table given in Trans. Am. Ent. Soc. 1874, p. 24, 

 which applies to males only. 

 Third joint of antenna similar in size and shape to fourth. 



Antennffi slender, feebly serrate, three basal joints only pilose ; sides of thorax 

 parallel not margined, hind angles strongly divergent. PL I, fig. 9. 



angusticullis Horn. 

 Third joint always much smaller than fourth, sometimes globular never triangular ; 

 antennae with short erect hairs. 

 Thorax not margined. 



Antennfe strongly serrate, joints 2 — 3 very small, equal, together slightly 

 longer than half the fourth. 



Elytra scarcely striate, thorax sparsely punctate teuuirorinis Horn. 



Elytra moderately deeply striate, thorax coarsely and moderately densely 



punctate corynibifoides Horn. 



Antennee serrate, joint three more than twice as long as second, the two 



together nearly as long as the fourth speratus Lee. 



Thorax distinctly margined, at least near base. 



Antennae stout, strongly serrate. PI. I, fig. 6 optattis Lee. 



Antennse more slender, feebly serrate niolestus Horn. 



The body is always fully winged in the males. In all the species the 

 constriction of the eleventh joint of the antennae near the tip is quite 

 evident except in molestus. 



There are but two females known, one of which belongs with reasonable 

 certainty to sperntus, the other probably to optatus. It may be needless 

 to say that the characters given for the sexes (loc. cit. p. 26), are not 

 valid, they are evidently variations of the male only. 



A. speratus 9 Lee— Parallel, rufo-piceous, feebly shining, sparsely pubes- 

 cent, body feebly winged. Head moderately densely and coarsely punctate. 

 Antennfe passing slightly the middle of the thorax, subserrate, first joint stout, 

 second small, round, third a little longer, fourth slightly longer than third, 4—8 



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