154 GEO. H. HORN, M. D. 



no American describers are responsible for it, the only mention of such 

 being in the ' Check List' by Mr. Crotch, for which no more authority 

 exists than is claimed in the preface. 



CXERIIS Fab. 



Our species of this genus are said by Mr. Gorham (Biol. iii. pt. 2, p. 

 148) " not to be typical and ought perhaps to be assigned to Thanasimus. 

 This is true of a certain number frt/'asciafus, repandun, undvlitvs and 

 duhius), but not of the vast majority. In fact, Mr. Gorham includes 

 spheffeiis, apinolae and nlgripes in Clerus as restricted by him. 



ClerKs mexrcanns Lap. This species has for some time appeared in 

 our lists. I have never seen a specimen from within our faunal limits 

 and am unaware of any authority for its introduction. 



O. arnchnodes Klug. This species is placed as a synonym of tiphegeus 

 by Mr. Gorham (Biol. Cent. Am. iii, pt. 2, p. 15()j. 



C. vidiius Klug. This species is simply indicated from " Ameri(|ue 

 Septentrionale," and as it is well known from Mexico and not at all in 

 our fauna should be removed from our lists. 



C. qiKidrigiittatvs Oliv. Of this species ivigrifrons and nigi-ipes Say, 

 are synonyms. 



C. thoficicus Oliv. This species is referred by Mr. Gorham to Faea- 

 lochroa Chev., but the latter author says that this genus has 9-jointed 

 antennae, which is certainly not true of our species. 



C deciissatiis Klug, Abhand. Akad. Berl. p. 29(5; Hopfneri Spinola, Clerites 

 1, p. 256, PI. XXV, fig. 1. Form of ichneumoneus, black, opaque, finely pubescent, 

 elytra with an arcuate fascia at middle interrupted at the suture, behind this a 

 common triangular spot, near the apex a narrower transverse fascia inlerrvipted 

 at suture, all of reddish yellow color. Length .38 inch'; 9.5 mm. 



The form described and figured by Spinola has the elytra in front of 

 the median fascia, the tlaorax and head reddish. Specimens are noted 

 by Mr. Gorham (Biol. Cent. Am. iii. pt. 2, p. 155) in which the anterior 

 portion of the elytra is black. My specimen goes further in being en- 

 tirely black. Similar variations in color seem quite common in Clerus, 

 notably in our C. 'ibri/jifiis Lee. 



One specimen, Arizona. 



<J. OCre:itus n. sp. — Form of ro-^marus, but slightly more robust, black, shin- 

 ing, sparsely hairy, antennae, tibiae and tarsi rufo-testaceous, elytra with a median 

 band of cinereous pubescence broadly interrupted at the suture. Front rather 

 flat, vaguely bi-impressed, head very sparsely punctate. Thorax slightly longer 

 than wide, ovate, slightly tubulate at base, post-apical transverse impression dis- 

 tinct, median line not distinct, surface sparsely punctate, punctures coarser and 

 more numerous along the apical margin. Elytra wider than the thorax, sides 

 parallel to middle then slightly broader, apices conjointly rounded, surface shin- 

 ing, obsoletely punctate at basa.I half, more evidently punctured posteriorly; the 



