26 ^\r. II. Scott 07i Corylophida3/rowi the 



inter se from tliose of Moro7iiUu^. Nevertlieless, Leconte and 

 Hon) and Matthews n'^arded UloP'^soma (like Moronillus) as 

 a synonym of liki/pohius ; but Gan<;lb;iuer (/. c.) was not 

 coiivinct'd, and Casey (1900, p. 65) wrote that G/teosoma is 

 altogether distinet from Uhijpohlus. I have examined the 

 type of G. velo.v under the highest power apjiiieable to a 

 carded spceimen, and found tliat the antenna; appeared almost 

 certaiidy 10-jointed ; but being still not satisfied, I mounted in 

 balsam the antenna o£ one of the North-African specimen?, 

 which seem absolutely identical with the type. This antenna 

 (tig. 39) is 10-jointed, having between the second and the 

 next large joint one small joint less than in RhjpohiuH, and, 

 as stated by AVoUaston, the form and proportions of the joints 

 differ from th'se of lihi/pohius. The three joints (5, 6, 7) 

 preceding the three club-joints are all much longer in propor- 

 tion than the corresponding three (6, 7, 8) in li/n/pobtus, and 

 the large middle one of the tin"ee especially is of a different 

 shape. 



If the number of Jintennal joints be used as the criterion 

 for separating the gencia, the matter may be summarized 

 thus : — 



Rhyj-iobms { = Moronillus) , antennte 11-jolntcd. 



Glceosonuif antennae 10-jointed. 



Secomliiry Sexual Characters. — I do not know of any 

 reference to these in lihypohius. But the material before me 

 includes three specimens of a species, apparently new, two of 

 Avhich have a n)arked impression on the nietasternum, while 

 in the third this is quite .absent. In comparing certain other 

 S] ecies with mine, it was seen, that some eNani[)les have 

 impressions on the metastenium and sometimes on the first 

 abdominal segment as well. Having before me two speci- 

 mens of i?//?/^yc/i/»s 7w//7co//i&- (Duval), one of which has the 

 sternum impressed while the other has not, I dissected these 

 and found tiiat the insect with impressed sternum is ^ , while 

 the other is ? . I therefore infer that the ventral impressions 

 are a ^ character, though further study is needed to prove 

 whether they are present in all or only in some sfjecies. 

 Those in which they have so far been observed are: — 



(i.) It. rvficoUis (Duval), ^ : a lather faint and narrow 

 longitudiial impression on the posterior ^ ot tiie metasternum, 

 and a long narrow impiession down the n.iddle of the lirist 

 abdominal segment. 



(ii.) li. breviconiisj Matih., J : a deep and rather broader 

 longitudinal im|;ression on the imtasternuu) ; on the first 

 abdominal segment a veiy broad and deep impression, 

 extending the whole h-ngth of the segment and nearly the 



