AMERICAN COLEOPTERA. 139 



Contributions to the COL>EOPTEROL.OGY of the United 

 States^, No. 3. 



BY GEORGE H. HORN, M. D. 



The exploration of newly accessible parts of our western country 

 and the more careful examination of older fields bring to our notice 

 from time to time many new species belonging often to groups which 

 have already been the subject of synoptic study. No course remains 

 but their description in an isolated manner. In the present paper 

 will be found species whose types are in the cabinets of either 

 Dr. Leconte or myself, and with their descriptions will be found such 

 short studies of genera as have been made on various occasions which 

 it is hoped will be found of value, the tables of genera and species 

 having been prepared for my own convenience other students will be 

 saved the same labor. 



CICINDELA Linn. 



C. anthracina n. sp. — Very black, shining glabrous. Labrum convex, 

 moderately long, twice as long at middle as at sides, lateral angles rectangular, 

 median lobe with an acute tooth at middle. Head entirely without pubescence 

 very finely strigose at the sides, surface opaque. Eyes moderate as in pulchra. 

 Thorax very little narrowed behind, apical and basal lines moderately im- 

 pressed, median line feeble, surface feebly convex very slightly wrinkled at 

 the sides. Elytra moderately convex, surface with coarse but not closely placed 

 punctures near the base which become rapidly finer toward the tip where they 

 become obsolete, tip of elytra not serrulate, sutural angle ( 9 ) slightly denti- 

 form. Body beneath black, very smooth and shining without hairs. Length 

 .56 inch ; 14 mm. 



This species seems to me to be best placed in our series between 

 longilahris and pulchra in a separate group, as the labrum is less 

 elongate than in the former while the front is without hairs in that 

 species as in the present; pulchra and its allies have a short labrum 

 more or less tridentate at middle and with the front hairy. The elytral 

 sculpture of the present species is however almost exactly that of 

 pulchra. The form of the thorax is here feebly narrowed behind 

 resembling pulchra and its allies while the thorax of longilalris is 

 decidedly narrowed behind and subtransverse. 



One pair collected at Fort Bayard, New Mexico. 



PTEROSTICIIUS Bon. 



P. {Feristeihus) Haniiltoui n. sp.— Oblong oval, black, shining, antennae 

 and legs brownish. Head smooth, front with the usual two convergent lines. 

 Thorax quadrate, a very little wider than long, base scarcely wider than apex, 

 the former truncate with angles acutely rectangular, the latter feebly eiuar- 



