1878.] 285 [Scudder. 



Male with the marginal apophyses of the last dorsal segment 

 slender, divergent, reaching scarcely one-third way over the supra- 

 anal plate; anal cerci broad, equal, broadly rounded at tip, scarcely 

 twice as long as broad ; apex of last abdominal segment notched. 

 Female with the median carina of the pronotum generally in- 

 distinct or wholly wanting on the anterior lobe ; prosternal spine 

 tapering, generally bluntly pointed at tip. . . M. allantis (Ril.) 

 M. femoratus is the species generally called Cat. biviifatus. The lat- 

 ter, however, is an interior species, while this, as will be seen in the 

 succeeding paper, extends across the continent. It is common every- 

 where in New England, and the female lays from seventy to ninety 

 eggs. From the abdomen of one I once extracted a species of 

 Mermis (?) at least six decimetres long. These insects are very fond 

 of a species of Inula (/. Helenium) growing by road-sides, and sun 

 themselves on its broad leaves. 



M. punctulatus is a rarity, and most of the specimens I have seen 

 have been without definite locality. I have taken it in Andover, 

 Mass., in November. Mr. Uhler gave me a specimen from near Bos- 

 ton, Mr. Henshaw has taken it in Massachusetts, Dr. Packard in 

 (Brunswick?) Maine, Baron Osten Sacken sent me a specimen from 

 the Middle States, and the late Mr. Walsh another from Illinois. 

 I formerly noted that I had taken it in Vermont, but I think this 

 must be an error. The species is allied to M. Helluo (Cal. Helluo 

 Scudd.) from the South. 



M. collinus is not a rare species. It is allied to M. luridus (Cal. lu- 

 ridus Dodge). It occurs in abundance at Sudbury, Vt., where eleven 

 years ago I first recognized it as distinct from other species, and occurs 

 in the vicinity of groves in dry hilly pastures ; comparatively few M. 

 femur-rubrum are found with it, the latter affecting open sunny spots 

 in hollows and the lowlands. The young of the two species may 

 readily be separated. I found this species devouring perfectly dead 

 and dry hickory leaves. I have also taken it in Andover, about Bos- 

 ton and on the island of Nantucket in this State, and Mr. Henshaw 

 has sent it to me from Jamaica Plain. 



M. rectus is again a rarer species. I have seen few specimens. 

 Mr. Henshaw captured it at Jamaica Plain, Prof. S. I. Smith for- 

 merly took it in Norway, Maine, and 1 have a single specimen taken 

 in the White Mt. valleys of New Hampshire. The species is nearly 

 allied to Mel. devastator Scudd. from the western part of the country. 

 M. femur-rubrum is the commonest species of all. On account of 



