Vol. XXX ] KXTOMOLOC.ICAL XF,\VS 77 



his hollandi requires a new name. As far as I can judge the 

 anterior lamina of the true hollandi and of chloris is less prom- 

 inent than in his hollandi, "Dinikcl braun" is rather too dark 

 for the basal spot of the hind wing of true hollandi. 



Having written Dr. Ris to this effect, he has replied (i5, ix, 

 1918): 



"Rhodopygia hollandi as described by myself from Surinam shows 

 evidently some slight differences from your type of Matto Grosso. Be- 

 sides the specimens recorded in the main text of Lib. [;'. c. Cat. Coll. 

 Selys cit.] there are three more mentioned in the appendix from the 

 Williamson collection. No doubt Mr. Williamson will send you his 

 specimens for inspection. From these my Rh. chloris is evidently differ- 

 ent and seems more closely allied to cardinalis than to them." 



Mr. Williamson has kindly lent me two males from British 

 Guiana, Tumatumari and Georgetown, respectively, both bear- 

 ing Dr. Ris' own identification label "Rhodopygia Hollandi." 

 An examination of them does not incline me to change my 

 opinion as to their difference from the typical hollandi as ex- 

 pressed above. On comparing them with two paratypes of 

 hollandi Calvert (Demerara i $ , Cuvaba i $ ), now in the 

 Academy of Natural Sciences of Philadelphia, I find that they 

 have 



One row of cells between Rs (subnodal sector Selys) and Rspl 

 (supplementary sector next below) on all the wings (two rows in true 

 hollandi) ; costal edge of the stigma, front wings, 3.25-3.5 mm. (4 mm. 

 in true hollandi) ; the apex or posterior angle of the external branch of 

 the hamule less acute than in typical hollandi, when the hamtile is view- 

 ed in profile so that both external and internal brandies are visible at 

 once (as in fig. 54, pi. IX, Biol. C. A. Neur., which does not exaggerate 

 the acuteness of this apex) ; first femur blackish anteriorly for the 

 whole length (reddish brown in typical hollandi'), first tibia blackish 

 both above and below (pale reddish or pale reddish yellow in typical 

 hollandi), second legs blackish on femur and tibia near their articula- 

 tion (not so in typical hollandi) ; coloring at the bases of the front 

 and hind wings a darker brown, but of the same extent as in typical 

 hollandi. Abd. 32, hind wing 35-36 mm. 



Whether hollandi Ris varies into hollandi Calvert can only 

 be determined by fuller series of specimens. 



Sympetrum illotum virgula (Selys). Yolcan Santa Maria: Oc- 

 tober 22, i<5, "abdomen crimson;" October 31, i and i pair "in " 



