56 Mr. Wcstwood on the Oenus Ctenostomua. 



5. Ct. Tugosum, elytris postice Isevigatis, macule baseos apiceqne 

 late pallidis. 



From Sturm's figure and Dejean's description of this last insect, it is 

 evident that the central fascia and the apical spot are united. It may also 

 be noticed that Klug's specific character of Ct. trinotatum, is not 

 sufficiently explicit, as it will also apply to Ct. ichneumoneum. Dejean, 

 however, has corrected it and indeed Klug's specific detailed description 

 appears exact. 



From the variation in the description of the markings of Ct. trinotatum 

 in the different authors, I think it not improbable (if the descriptions and 

 figures be faithful) that two distinct species are confounded ; since, from 

 Klug's description, and Fischer's figure, it appears that the base itself 

 of the elytra is pale yellow, while Dejean's description and figure in the 

 Iconographie des Coleopteres, t. 2, f. 1 , represent the basal spot as a 

 distinct fascia " prcs de la base." If my supposition, which is not an 

 improbable one, be correct, Fischer and King's insect will retain the 

 name of trinotatum, and it will be specifically characterized as above by 

 its " macula baseos;" and it will be necessary to give a new name to 

 the insect described and figured in the French works. 



Description of the Figures, fall more or less magnijied. J 

 Tab. Supp. xli. 

 Fig. 3. Ctenostoma ichneumoneum, Dej., ^ 



a. Labrum of the male. 



h. Ditto of the female. 



c. Apex of the elytra of the male. 



d. Ditto of the female. 



e. Underside of the terminal joints of the abdomen of the male. 

 /. Ditto ditto of the female. 



gr. Anterior tarsus of the male. 



h. Ditto of the female. 



X. Posterior part of the thorax and its appendages, and abdo- 

 men of the male, with one of the elytra opened to shew 

 the size of the wing. 



i. Head of either sex, shewing the relative size of the palpi 



