76 [September, 



of one form, previously described by Signoret as Ghoerocoris nigri- 

 collis. Dr. Stal, in his Enum. Hemip., has already included C. sil- 

 phoides as a synonym of that species, from which it does not differ, 

 but, apparently led away by Mr. Walker's remark at the end of his 

 description of C. erotyloides, that " the shorter body and the marking 

 of the thorax and scutellum distinguish it from comes,''' has placed 

 this form as a variety of C. comes, Fab. The following is the synonymy 

 of the species, and synopsis of variation, which is merely that of colour : 



Thorax unicolorous. Sciitelhim bicolorous. 



C. nigricollis, Sign. {Choe. nif/ricollis), Sign., in Thorns. Arch, ent., ii, p. 270, 



489, pi. 11, fig. 1 (1858). Graptocoris nigricollis, Still, H. Afr., i, p. 40, 4 



(1864). Cryptacrus silphoides, Walk. (Type), Cat. Het., i, p. 12, 5 (1867). 



var. a silphoides, var. )3, Walk., Cat. Het., i, p. 12 ...Brit. Mus. 



var. 6 „ var. 7, Walk., ib. ...Brit. Mus., Coll. Distant. 



Thorax bicolorous. Scutellum bicolorous. 



Tar. c erotyloides, var. j3, Walk., ib. ...Brit. Mus. 



var. rf „ type, Walk., ib. p. 11... Brit. Mus. 



Thorax and scutellum unicolorous. 



var. e shining bluish-black above, in all other respects agreeing with typical 

 form. Hab. : Mongo-ma-lobah Coll. Horniman, Distant. 



C. erotyloides does not differ in size from silpJioides, as stated 

 by Mr. Walker. I have seen specimens of each which are strictly 

 alike. It will be seen that the range of colour-variation is alike in 

 both C. comes and G. nigricollis, the varieties of each I have here de- 

 scribed being either extreme or primitive forms, in which there is a 

 total absence of yellow markings above. 

 West Diilwich : Aug. 1st, 1877. 



BRITISH SEMlPTERA-HETEROPTERA—KDDlTlOl^iA.'L SPECIES. 

 BY O. M. EEUTEE. 



1. Okthottlus ( = Liiosoma) viridinervis, Kirschb., nee D. & S. 



Gajjsus viridinervis, Kirschb., Ehynch. Wiesb., pp. 78, 75, and 

 142, 13. 



Pale and somewhat transparent green, clothed with rather longish ochreous 

 hairs ; membrane pellucid, the nerves bright and constant green ; vertex distinctly 

 marginate ; rostrum reaching to tlie apex of the second pair of coxa) ; antennaj 

 about one-fourtli shorter than the body, first joint as long as the head, second joint 

 a little more than three and a-half times as long as the first, third joint only about 

 half as long as the second, the fourth more than half as long as the third, the last 

 two joints together shorter than the second ; the first and the second joint with a 

 few longer pale hairs. , Length, ^ , 6, ? , 5J mm. 



