NORTH AMERICAN COLEOPTERA. 129 



the middle in both sexes, humeri distinct, surface rather shining, with about fif- 

 teen rows of rather fine not closely placed punctures, the intervals with a single 

 row of finer and more distant punctures, the fourth, eighth, twelfth and subraar- 

 ginal intervals with a series of moderately distant larger golden punctures. Pro- 

 thorax beneath sparsely punctate, metathorax at sides more coarsely, abdomen 

 sparsely punctate at the sides. Length .72-.80 inch; 18-20 mm. 



The male has three joints of the anterior tarsi spongy pubescent 

 beneath. This species from the evident golden el3^tral spots must be as- 

 sociated with calidum and tepidum, than either of which it has much 

 smoother elytral sculpture although resembling them in general form. 

 It might be mistaken for a smooth variety of obsoletum, but the elytra 

 are more dilated, their sculpture smoother, and without the imbricated 

 appearance. The base of the thorax is distinctly bisinuate in obsoletum 

 and simply emarginate in the present species as well as in those with 

 which it is associated. 



Collected by Mr. H. K. Morrison in Colorado. With it I associate 

 his name as an evidence of my appreciation of his industry and success 

 in adding to a knowledge of our fauna. 



STOL.OKIS Motsch. 



The occurrence of a species of this genus within our faunal limits is 

 rather unexpected, as none have as yet been found north of Yucatan. 



Stolonis was rather insufficiently described by Motschulsky (Bull. 

 Mosc. 18G5, ii, p. 230), but to Mr. H. W. Bates we owe a fuller expo- 

 sition of its characters in his usual able manner (Ent. Mo. Mag. viii, p. 

 148). Chaudoir gives some additional information regarding species ap- 

 parently unknown to Mr. Bates (Bull. Mosc. 1873, p. 85). 



There can be no doubt of the correctness of the views of Bates and 

 Chaudoir in associating Stolonis with Loxandrus. The three glabrous 

 antennal joints and the elytral plica are sufficient to indicate its position 

 in the Pterostichini. The anterior tarsi are obliquely dilated in the 

 males as in Loxandrus, although Chaudoir says this is very feebly evident 

 in the smaller species. The elytra have one dorsal puncture on the third 

 interval rather closer to the second stria, there is no scutellar stria. 

 Chaudoir indicates the only positive and permanent character which will 

 distinguish Stolonis and Loxandrus. In the former the thorax is strongly 

 constricted at base forming, as it were, a neck. The acute margin of 

 the thorax does not extend on this neck. 



S. Ulkei n. sp. — Pioeous black, shining, iridescent. Head smooth, a deep 

 frontal impression each side, and a slight trace of a vertical fovea. Antennse 

 slender, basal joint testaceous, 2-6 piceous, 7-11 white. Thorax cordate, sides 



TRANS. AMKR. ENT. SOC. XII. (21) MARCH, 1885. 



