1855.] 299 



truelis, and more finely and densely punctured. The head and thorax are never 

 clouded ; the vittae of the elytra are sometimes reduced to merely a confused 

 cloud behind the middle; at other times they are visible nearly to the base; in 

 the latter case the first and third are a little shorter anteriorly, and the third 

 and fourth are interrupted befofe the middle. In some there is a slight remnant 

 of an interrupted submarginal stripe. The thorax is formed as in H. patruelL-. 

 and is sometimes marked with a central fuscous dot. 



70. H. discoideus, latior ovalis fere depressu3 (minus nitidu?) subtus 

 niger, antennis pedibus eorporeque supra testaceus, capite lateribus et occipite 

 infuscato; thorace elytris angustiore macula magna ba3ali infuscato, L-tteribus 

 late rotundatis teuuiter marginatis cum elytris angulum formantibus, elytris 

 confertissime punctulatis disco maximo communi infuscatis, sutura lineolisque 

 anticis paucis pallidioribus, margine late testaceo relicto. Long. *15. 



One female found at Fort Laramie. Broader and flatter than the allied 

 species, and (in case the male should be more shining and more coarsely punc- 

 tured) distinguished by the large basal spot of the thorax. The head and thorax 

 are moderately punctured; the dark portion of the elytra is very well defined, 

 and does not fade at all into the broad pale margin. 



73. H. m e 1 1 i t u s , subovatus convexus postice attenuate, flavo-testaceus 

 subtiliter pubescens, capite punctulato epistomate late emarginato, thorace sub- 

 tiliter punctato lateribus tenuissime marginatis late rotundatis cum elytris angu- 

 lum haud foimantibus, his sat dense subtiliter punctatis, piceis, margine, lineolis 

 ad basiu maculis lateralibus duabus alteraque subapicali pallidis. Long. -09. 



One specimen from Vermont, collected by the late Prof. U. B. Adams. By the 

 form of the epistoma it resembles H. hybridus, but is much smaller and more 

 ovate in form, while the spots of the elytra do not form transverse fascia?, though 

 those that remain are referable to that style of marking. 



Synopsis of the Lathridiides of the United States, and northern contiguous 



Territories. 



By John L. Le Conte, M. D. 



Corticaria Marsh am. 

 A. Antennae articulis 9 et 10 subaequalibus. Sp. 1 26. 



1. C. gro3sa, fusco-testacea, longe parce cinereo-pilosa, thorace fere rotun- 

 dato, capite vix latiore parce punctato, lateribus 7- vel 8-dentatis, ad basin late 

 foveato, elytris elongato-ovalibus convexis, thorace duplo latioribus giosse vix 

 ordinate putactatis, stria suturali postice distincta. Long. '11. 



One specimen found at the edge of a salt marsh, near Cambridge, Mass. in 

 May. Readily distinguished from all others here described by its large size and 

 coarse almost irregularly disposed punctures. 



2. C. serricollis, elongata parum convexa picea, parce breviter cinereo- 

 pubescens, thorace rotundato-cordato lateribus minu3 subtiliter serratis, confer- 

 tim punctato ad basin fovea rotunda impressa transversim vage extensa ; elytris 

 oblongo-ovalibus, elongatis, thorace paulo latioribus seriatim punctatis iutersti- 

 tiis punctis uniseriatis minoribus notatis : antennis basi fusco-testaceis. Long. 

 10. 



Lake Superior, two specimens: very similar in all its characters to the next, 

 and only distinguished by the narrower elytra, and wider and less convex 

 thorax: the latter is somewhat less densely punctured, but the basal fovea is 

 obsoletely prolonged each side. As in the four next species the stria? of the 

 elytra are hardly impressed, their punctures are very distinct anteriorly, but grow 

 small towards the tip, till they are hardly larger than the intervening rows of 

 small points. The head just behiud the eye is armtd each side with an obtuse 

 not very distinct tubercle. 



