428 Materials for a Monograph 



Serv., but differs from it very distinguishably in its much 

 greater slenderness ; in the relative proportions of the length 

 of hind femora and ovipositor of the females, it agrees with 

 G. abbrevialus, but the latter is a heavy, clumsy species; 

 in G. abhreviatus the breadth of the body is contained in 

 the length about three times ; in G. angnstus about four 

 times; in coloration it does not differ from G. abbrevialus; 

 it seems to be quite a rare species. 



Length of ovipositor .80-.34 in., average, .32 in.; length 

 of hind femora, .18-.20 in., average, .19 in. 



Cambridge, Mass., and Cape Cod, (S. H. S.) 3 9. 



*4. G. NEGLECTUS, nov. sp. 



This is our most common species, and probably the one 

 which Harris intended to describe in mentioning G. nigra, 

 but the specimens in his cabinet marked " unique " show 

 his nigra to be another species. The head, thorax, and 

 body, as well as the hind femora, are pitchy black, the elytra 

 of both S and 9 are dark, sometimes jet black, but fre- 

 quently of quite a light ochraceous brown ; indeed, the 

 elytra of almost all our species vary to this extent in color- 

 ation ; the elytra of the females generally cover about two 

 thirds of the abdomen, although sometimes they entirely 

 conceal it ; those of the males extend to the extremity of 

 the abdomen ; the ovipositor in this species is proportion- 

 ally shorter than in either of the preceding species, and is 

 also a smaller species than any of the preceding. 



Length averaging a little more than half an inch ; length 

 of ovipositor in nine individuals .23— .32 in., average .28 in. ; 

 length of hind femora, .16-.21 in., average, -20 in. 



Mass., (Mus. Comp. Zool., Miss Edmands, Sanborn, 

 S. H. S.) Cape Cod, (Sanborn, S. H. S.) 



* 5. G. NIGER. 



Ac/iela 7iigra, Ilarr., Report, 3d ed. ; 152. (1862.) 



This species agrees in size with G. ncg/eclus, but differs 



from it in the much shorter ovipositor, which is shorter in 



