450 Materials for a Monograph 



in the latter, and in the same the presence of a broad 

 black band on either side of the tubercle of the vertex, 

 which exists in the former but seldom, and then it is very 

 narrow. 



$ Length of wings, 1.7 in. ; breadth in middle, .32 in. ; 

 of hind femora, .9 in. 9 Length of wing-covers, 1.9 in. ; 

 extent of wing-covers beyond wings, .1 in. ; breadth of 

 wing-covers in middle, .22 in. ; length of hind femora, 1 in. ; 

 of ovipositor, 1 in. 17 $ green, 19 $ brown, 1 9 green. 

 Cape Cod, by the sea-beach, Sept. (S. H. S.) 

 This peculiarity of having its individuals either wholly 

 green or wholly brown, extends to C. ensiger also, and is 

 found in both while the animals are alive ; I have never 

 seen a brown 9 alive. 



3. C. OBTUSUS, Burm., Handb. d. Ent. ; II. 705. (1838.) 

 C. dissimilis, Serv., Hist. Nat. d. Orth. ; 518. (1839.) 

 " Harr., Report, 3d ed. ; 164. (1862.) 



Georgia, (Mus. Comp. Zool.) 7 9. 



4. C. UNCINATUS, Harr., Report, 3d ed. ; 164. (1862.) 

 The legs in this species are much shorter and more ro- 

 bust than in any other American species I have seen. 

 Length of hind femora .65 in. I have seen only Harris's 

 original specimen. 1 9. 



Alabama, (H. Coll.) 



5. C. CREPITANS, nov. sp. 



The specimens I have examined were dried after an im- 

 mersion in alcohol, and are uniform in their coloration 

 throughout, with indications of light yellow lateral streaks 

 on the prothorax, as in (7. robustus ; the tubercle of the 

 vertex is devoid of markings ; the shape of the tubercle 

 is very similar to C. robustus , but it is stouter than there ; 

 head and prothorax punctured throughout, the latter with 

 a faintly impressed median line. This is a large species, 

 broad across the mesothorax as in C. robustus^ having very 

 long and narrow wings, long and slender legs, and a 

 rather long ovipositor. 



