158 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



rugose; black humeral spot absent; sutural vitta narrow, smaller 

 than the red humeral space; blue median vitta moderate and more 

 or less arcuate laterally. Body below and legs black, ventral segments 

 at sides and fifth at apex largely red. Fifth ventral and last dorsal 

 segment of the male scarcely emarginate, last dorsal of the female 

 emarginate at apex. All the claws of the male cleft, the inner tooth 

 shorter than the outer, of the female simple. Length, 5.5 mm. 



San Diego (Schwarz) and Alpine (Wickham), Texas; Luna 

 (Wickham) and Water Canon (Snow), New Mexico; San Bernardino 

 Ranch (Snow) and Chircahua Mountains (Owen), Arizona; San 

 Diego (Orcutt), California. 



Type, allotype, and two paratypes. — Cat. No. 23085, U. S. N. M. 



The type, a male, and a female allotype from San Diego, Texas, 

 in the L T nited States National Museum, parat3*pes in collections of 

 Prof. W. F. Wickham, American Entomological Society, University 

 of Kansas, and Brooklyn Museum. 



This is the most widely distributed species of the genus, of which 

 I have seen about thirty specimens. I have also a specimen which 

 possibly was collected in Mexico. It is one of our smallest species, 

 measuring from 5.5 to 8 mm. and of the same form as femoralis and 

 nigriventris. The blue median fascia is never very strong and reduced 

 in some specimens to a small rounded spot on each elytron near 

 suture, and the sutural vitta does not reach the scutellum in some 

 specimens. The sculpture of the elytra is in some specimens more 

 coarsely rugose than in others, though the punctuation is always 

 rather sparse. The males are readily separated from the other 

 species by having all the claws toothed, or rather cleft, and the 

 females, besides the coloration and markings, by the distinctly 

 emarginate apex of the last dorsal segment. This latter character 

 is rather unusual and is present only in the female of antennatus, 

 which differs in antennal and other characters from deMipes. 



AULICUS ANTENNATUS, new species. 



Male. — Head black, rather closely and coarsely punctate; palpi 

 black; antennae black, the first joint below and the second and third 

 reddish; joints three and four rather elongate and subparallel, five 

 slightly dilated, six to ten subtriangularly dilated but joints nine 

 and ten much larger than any of the preceding joints, joint eleven 

 longer than ten, oval, pointed near apex. Prothorax bluish-black, 

 rather sparsely punctate. Elytra sparsely and not coarsely punctate, 

 surface between the punctures more or less rugose; basal part of 

 sutural vitta nearly parallel to suture and wider than the red humeral 

 space; median vitta moderately large, arcuate laterally. Body 

 beneath and legs entirely bluish black, fifth ventral segment rather 

 deeply arcuate-emarginate and last dorsal rounded at apex; the 

 inner claw of the front tarsi distinctly toothed. Length, 6.5 mm. 



