ENTOMOLOGICAL WORK IN COLORADO. 30S 



great town of Pueblo, smoky by day, and bright with the lights 

 of furnaces by night. We camped under some pine trees, and 

 close to the edge of a most interesting caiion, called Wales 

 Canon, which had steep, sloping sides, going down to a con- 

 siderable depth, with an open space at the bottom, except where 

 there were thickets or aspen {Pojmlus trcmulo'ides) trees. The 

 sides of this canon were remarkable for a new variety of oak — 

 Quercus undulata var. cinerio, v. nov., small, with pale, rough 

 leaves, nearly two inches long, with sinate margins, and short, 

 stiff teeth (var. wrightii, Engelm,, is the nearest approach 

 to this, but the leaves are much smaller), which grew together 

 with an almost typical form of the same species, the difference 

 between them being so marked that it was hard to believe 

 that they were not specifically distinct. Yet it is probable 

 that intermediate forms will be found, such is the variability 

 of the scrub oak. In this canon I met with a variety of 

 insects, and several species of Mollusca, most of which {e.g. 

 Conidus fidvus, Hyalina radiatida, Helix pulchella var. costata) 

 were quite identical with British species. I mention these 

 points, because although not entomological in themselves, they 

 are helpful towards a proper understanding of the origin and 

 nature of the insect fauna. Of the Lepidoptera taken about 

 and in Wales Caiion, some yet remain unnamed, but the follow- 

 ing may be mentioned : Natlialis iole, Phyciodes camillus, Edw., 

 Limenitis iDeidemcycrii, and Danais plexippiis. Of Hymenoptera, 

 I observed Sircx (or Urocerus) Jiavicornis, Fabr. (very like the 

 European S. gigas) ; Rhodites, sp., galls observed on rose-bushes; 

 Chrysis pacijica, Say, (a brilliant green species); Polyhia, sp.; 

 Melissodes, sp., and a bright green bee of the genus Agapostemon. 

 Diptera were represented by numerous unidentified species, and a 

 large grey Asiliid fly, which Prof. Eiley informs me is Procta- 

 canthus milhcrtii, Macq. 



Among the Hemiptera, I took Lygceiis facetus,Sa,y (a species I 

 also find commonly in Custer County), Nabis inscriptus ; Melago- 

 notiis 5-spinosus ; Tingis, s])., Proconia costalis, Fab. (on which 

 were parasitic red mites, Scirus, sp.), and unidentified species of 

 Proconia, ClastojJtcra, and Bythoscopus ; while the Coleoptera 

 found were Eleodes extricata, Say ; PLippodamia concergcxs, Guer. ; 

 Avuira interstitialis, Dej. ; Carahus tcedatus, Fab. ; Pterosiichiis 

 Jicrculaneus, Mann. ; Asida sordida, Lee. ; Epicauta ferrugiiiea, 



