MR. W. F. KTRBT OIV^ TORFTCULTDTE. 507 



G-enus TV. Thermastris, DoJirn. 



Dohrn, Siett. ent. Zeit. xxiv. p. 61 (1863) ; Scudd. 

 Bull. IT. S. Geol. Surv. ii. p. 249 (1876), 



Type, Forficula hrasiliensis, Grray. 



I do not understood why Dohrn places this genus among those 

 with the scutellum concealed. In the three species before me 

 {T. hrasiliensis, Gray, T. Saussurei, Dohrn, and T. cliontalia, 

 Scudd.) the exposed scutellum is as large as in Pygidicrana. It 

 is true that the scutellum is concealed iu Serville's figure of his 

 J^yragra fuscata ; but I cannot follow De Bormans in placing 

 Thermastris as a synonym of 'Pyragra. 



Grenus V. Ctlindro&astee, Stxd. 

 St°l, (Efv. Vet.-Akad. Fori. xii. p. 350 (1855). 

 Type, C. gracilis, Stal, from Eio Janeiro. 



In this curious little genus I have two species to describe, one 

 Eastern and one Western. 



CtLINDEOGASTER NIQ-EICEPS, Sp. U. 



Long. corp. 11 millim. ; segm. ult. cum foreip. 3 millim. 



Head deep black, a groove within eacb eye, running to the 

 occiput ; clypeus black, shining ; labrum transverse, pale yellow, 

 as are also the palpi ; neck yellow ; antennae 19-jointed, chocolate- 

 brown, scape black ; pronotum half as long again as broad, black, 

 with the hind border broadly pale yellow, this colour curving up 

 the sides nearly to the broadest part of the pronotum ; scutellum 

 reddish brown, with a yellow dot at the extremity ; tegmiua 

 reddish brown, the costa rather broadly black ; visible part of 

 the wings yellow, with a large dusky spot before the extremity ; 

 abdomen reddish brown, terminal segment black and shining, 

 forceps reddish towards the extremity j legs yellow ; femora and 

 tibise broadly black in the middle. 



Hah. Hong Kong. 



Cylindro&aster Jaistsoni, sp. n. 



Long. Corp. 10 millim. ; segm. ult. cum foreip. 3 millim. 



Male. Head shining black, a strong lateral ridge behind the 

 eyes, and extending at nearly right angles across the occiput ; 

 palpi tawny ; antennae with the scape black, and the flagellum 



