May iSgg.] 



SUPPLEMENT TO PSYCHE. 



shining, not impressed, finely .md sparsely 

 piinctulate, sinuous elevated line fine but 

 distinct. 



Length, 1.6 mm. 



Locality, Tucson, Arizona ; type, 

 U. S. Nat. Mus. (Collection Hiibhaid 

 & Schwarz). 



Described fioni two specimens found 

 by Mr. H. G. Hubbard on December 

 30, 1S96 in a decaying Cereiis gigan- 

 tcus. The species is distinguished from 

 C. niimttum by its shining surface, the 

 sculpture of the elytra, not inflated 3nd 

 palpal joint, sculpture of metasternum 

 and other characters. C. a?nericam/!)i 

 agrees with C. cerei in the structure of 

 the palpi but differs by the sculpture of 

 the elytra and of the underside and by 

 its much shorter mesosternal plate. 



Omalium {Pfiyllodrefa) cacti n. sp. 

 (family Staphylinidae). — Moderately elon- 

 gate, parallel, subdepressed, shining, pice- 

 ous ; mouthparts, antennae, sides of thorax, 

 tlie larger portion of elytra and the legs red- 

 dish yellow; pubescence not obvious when 

 the insect is viewed from above but quite 

 conspicuous upon a lateral view. 



Head as long as wide, slightly convex 

 between the e^'es, alutaceous, impunctate 

 between the frontal impressions which are 

 deep and shining, distinctly and sparsely 

 punctulate behind, without impressions in 

 front of ocelli; tempora not prominent, 

 rounded and much shorter than the diameter 

 of the eyes; labrum slightly emarginate in 

 front; last joint of maxillary palpi fully twice 

 the length of the preceding joint; antennae 

 slightly longer than head and thorax com- 

 bined, with a six-jointed club, but joint 6th 

 is much smaller and narrower than joint 7, 

 though considerable wider than joint 5 ; joint 

 2 slightly longer than wide; joint 3 at base 

 narrower than joint 2 and about twice as long 



as wide; joints 4 and 5 each as long as wide, 

 joint 6 decidedly wider than 16ng. Neck 

 alutaceous without distinct punctuation. 



Thorax distinctly wider than long; front 

 margin truncate and hardly narrower than 

 the base; sides regularly arched, front angles 

 obtuse, not prominent, hind angles more 

 distinct but likewise obtuse; a feeble depres- 

 sion along the sides in front of the hind 

 angles ; surface alutaceous, moderately finely, 

 not densely punctate. Scutellum alutaceous 

 with a few fine punctures. 



Elytra at base decidedly wider than the 

 thorax, distinctly longer than wide and about 

 as long as the exposed portion of the abdo- 

 men ; humeri distinct but rounded; surface 

 more shining than the thorax, densely 

 punctate, the punctures coarser than those of 

 the thorax and more or less distinctly sub- 

 seriately arranged ; color reddish yellow with 

 the base, the sutural space and the apex 

 more or less widely infuscated. Abdomen 

 subparallel, above and beneath alutaceous, 

 with fine, scattered setigerous punctures. 



Underside of head on each side of the gular 

 sutures indistinctly rugose; prosteruum 

 alutaceous without distinct punctures ; meso- 

 sternum alutaceous, not carinate ; metaster- 

 num alutaceous and very sparsely punc- 

 tate. Tibiae hairy on outer edge, the 

 middle and posterior ones also with a few 

 short spines. Fifth joint of hind tarsus 

 slightly longer than joints 1-4 combined. 



Length 2.6 — 2.S mm. 



Locality, Tucson, Arizona : type, 

 U. S. Nat. Mus. (Collection Hubbard 

 & Schwarz) . 



Described from many specimens 

 found by Mr. H. G. Hubbard December 

 35, 1896 in decaying Cereiis gigati- 

 teus. 



Ephistemus cactophilus, n. sp. (fam- 

 ily Cryptophagidae). — Rather narrowly 

 oval, more narrowed behind than in front, 

 very convex, shining, pale brownish red, 



