130 Eev. T. A. Marshall's monogrcqjh of 



Black ; al)domen at the base with 2 large triangular yellowish 

 subconfluent si^ots; legs (^ flavo-testaceous ; coxae, a streak on the 

 interme(lia,te femora, hind femora except at the base, hmd tibiae at 

 the apex and narrowly at the base, black; tarsi fuscous, 1st joint 

 more or less testaceous ; in the ? the trochanters are partly 

 fuscous, and the intermediate femora black nearly to the apex. 

 Wings infumated, especially towards the apex; costa, nervures, 

 and stigma fuscous ; parastigma, praebrachial nervure, and squamulae 

 dull testaceous; radial areolet longer but not broader than the 

 stigma ; 8d abscissa of the radius slightly curved ; radius of hind 

 wings sinuated. Body scarcely shming. Head with a transverse 

 vertex, contracted behind the eyes, cheeks not dilated ; punctulate 

 in front, orbits and cheeks striolated ; frontal fovea shallow, gemi- 

 nated by a carina. Antennae <? 28-jointed, filiform to about the 

 18th joint, thence gradually attenuated, as long as the body ; of the 



5 16-jointed, dilated from the middle to near the apex, the last 3 

 joints smaller. Mesothorax rather shining in front, punctulato- 

 rugulose, coarsely reticulated or sulcate behind. Scutellum rugu- 

 lose. Metathorax reticulated, short, truncate, the basal portion 

 more horizontal than in the last species, with 2 medial carinse, and 

 the hind angles dentiform. Abdomen at the base sulcate, after- 

 wards reticulato-rugose, striated, behind more finely, the apex 

 somewhat shining. Anus ^ imperforate ; terebra J concealed. 



<y $ . Length, 1^ ; wings, 3 lin. 



Described from two males and one female. The 

 agreement between the sexes is so complete that I 

 cannot do otherwise than join them, though the ? was 

 taken separately. It would be mere guess-work to 

 attempt to name them from the books ; C. cylindrus, Nees, 

 Mon., i., 291, 3' may perhaps be compared, having 29- 

 (?. e., 28-) jointed antenna ; but it is a larger insect (22- lin. 

 long), and otherwise different. C. Jhiestratus, var. ^, 

 Nees, might be the ? , but it has no separate description, 

 and the typical form in either sex is quite beside the 

 mark. Thomson's C. fenestratus ^ has 23-jointed 

 antennae, and the description is too short ; but in any 

 case that name cannot stand. My specimens are old, 

 and some few details cannot well be taken from them. 



The two males are from Darenth Wood ; the female 

 from Milford Haven. 



Eeinhard (Berl. ent. Zeit., 1867, p. 3G0) has proposed 

 to make another genus of those Cheloni whose females 

 have 16-jointed antennae, and the males a perforated 

 abdomen. But the existence of such a species as the 



