532 BULLETIN 182, UNITED STATES NATIONAL MUSEUM 



LXXXIX. Genus ANACYPTUS Horn 



Anacyptus Houn, 1877, p. 87. 



Microcyptus Horn, 1882, p. 1. 



Micrevyptus Eichelbaum, 1909, p. 196 (misspelling). 



Genotype. — Hypocyphtits testaceus ljeConte= Anacyptus testaeeus 

 (LeConte) (monobasic). Of Mic^'ocyptus, Hypocyphtus testaceus 

 JjeConte— Microcyptus testaceus (LeConte) (Rules, Article 30, II, f). 



Diagnosis. — Head short and strongly deflected, not distinctly mar- 

 gined beneath the eyes; hypostomal and coronal sutures not visible; 

 antennae lO-segiTiented with the two basal and three apical segments 

 enlarged, inserted at sides of head close to eyes ; labrum semicircular ; 

 maxillary palpus subulate, third segment large ; gular sutures widely 

 separated ; pronotum and elytra extended beneath the body ; anterior 

 coxal cavities not at all concave but open behind; front coxae very 

 large, exserted; middle coxae narrowly separated; posterior coxae 

 very large, contiguous, broadly 'expanded laterally and caudally 

 beneath the femur and with an expansion over the base of the femur; 

 abdomen narrowly margined basally, first and second sternites absent ; 

 tarsi 4-segmented. 



Remai'hs. — This genus contains the smallest species of Staphy- 

 linidae known. It is distinguishable by its size, by the shape of the 

 antennae, and by the structure of the posterior coxae. 



The name Microcyptus was proposed by Horn to replace Ana- 

 cyptus., which he believed to be preoccupied. However, under our 

 present code of nomenclature, Anacypta Illiger does not preoccupy 

 Anacyptus., and the latter must be accepted. 



Only one species is known from the West Indies. 



1. ANACYPTUS TESTACEUS (LeConte) 



Hypocyphtus testaceus LeConte, 1863, p. 30. — Hoim, 1877, p. 120. — Henshaw, 



1881, p. 219.— Eichelbaum, 1909, p. 196. 

 Aivacyptus testaceus (LeConte) Hoen, 1877, p. 87, 125. — Schwarz, 1878, p. 440. — 



Henshaw, 1881, p. 219. 

 Microcyptus testaceus (LeConte), Schwabz, 1889, p. 160.— Duuy, 1902, p. 124.— 



Wasmann, 1903, p. 98.— Eichelbaum, 1909, p. 196.— Blatchley, 1910. p. 



442. — Bernhauer and Schubert, 1916, p. 495. 



Description. — Rufotestaceous. Head sparsely minutely punctulate, 

 without ground sculpture. Pronotum minutely punctulate and 

 pubescent, the tiny setulae arranged to appear like striae; without 

 ground sculpture. Elytra minutely punctulate and pubescent, the 

 tiny setulae forming longitudinal and sometimes diagonal lines; with- 

 out distinct ground sculpture. Ahdomen generally very much 

 retracted, with rather dense setae at the sides. Length, 2/5 mm. 



