10 
PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, 62. 
39. Sides of elytra angulated at middle ; pronotum piceous, with the sides narrowly 
margined with dull green; elytra violaceous........ nigricollis Waterhouse. 
Sides of elytra not angulated at middle; color very variable. 
compactus Waterhouse. 
40; iA bovenstrongly depressed... ..</.ji25.0.sntnni eee. lenin a ee 
Above moderately convex........ suviciet este bee. p42 
41. Head and pronotum pale eon Peuicieed vicar, ve a alee beneath 
piceous ; female with last abdominal segment strongly produced at apex, with 
a deep V-shaped incision at middle, and with one broad and three very sharp 
teeth on each side........-.- ---...... chapuisi (Dugés). 
Head, pronotum, and eae ae eee oe! caeruleus; beneath dark 
ereen; female with last abdominal segment not strongly praduead, slightly 
arcuate at apex, with eight teeth, the outer tooth at each end of the series is 
acute and the apex pointed Ce the other six teeth are broad and nearly 
truncate. tase sitet . deplanatus (Chevrolat). 
42. Elytra Brenniely, eee ree ees fi eae TERNS SAL gis ae aS 
Elytra not arcuately attenuate from base to a P4 wongie Sane AS 
43. Surface above uniformly piceous, with a feeble violaceous reflection: 
unicolor Fisher. 
Surface above bicolored ; head and pronotum golden-green, the latter with the 
median part cupreous ; elytra cyaneous or purplish. ..-.- ardens Waterhouse. 
44. Elytra a little wider at basal fourth than at base..............-.......+-.-- 45 
Elytra with sides parallel to apical third, and rather strongly angulated near 
mid dlex soqeres! ih. Sa hk SA ee ee ah hee ee eee 55 
45. Surface above uniformly cyaneous.....-..........2...-.-5 affinis Waterhouse. 
Surfacerabaw.e bicolored o.oo ce rcsniclnhiratn toeoras taseasescpmrera oe he ee 
46. Ebytraibeoloned cc blu g2gs0eR 6c oo ks sn eben ean he caw = SER ee ae 
Elytra ‘unicoloredis sek. 63 Yi eeieides eee aoe Area or beeper ieee 48 
47. Elytra coppery-red, with the disk fuscous.....-.-... granulosicollis Waterhouse. 
Elytra cyaneous, with the apical third bright coppery-red, the coppery area 
margined anteriorly with a strong violaceous color........ cupricauda Fisher. 
48. wEronotumsunicolonedy!) 222s. 8 ste. 2S. Ds Se ee 49 
Pronotumybicolored nad sarah sass 2a eee ee eee 52 
49. Pronotum golden-green or aeneous......-- 5 sonte ude. dere oD 
Pronotum uniformly black with an aeneous FOE son wan igus euceleen ates 51 
50. Pronotum golden-green; elytra coppery-red..........---- fulgens Waterhouse. 
Pronotum aeneous; elytra dark bluish-green............- constans Waterhouse. 
51. Elytra purple; female with the last abdominal segment narrowly rounded at 
apex, with a deep y-shaped incision at middle, and four nearly equidistant 
teeth on each side, arranged in a curve, the central pair is a little larger (not 
longer) than the outer ones..............--.---- purpureipennis Waterhouse. 
Elytra piceous, with a strong bluish-green and violaceous tinge; female with 
the last abdominal segment narrow and strongly produced at apex, deeply, 
narrowly, and arcuately emarginate at middle, with a very strong tooth on 
each side of it, next to which is a shorter tooth, and on the outside, a very 
small acute tooth at a lower level............-.-. panamensis female Fisher, 
52sMlytra/eyaneousie.. ci... iece Luscleee Was 5 Se no 
Elytra piceous, wits a strong bbiisheoesba and violaceous tinge; pronotum 
piceous, with the sides aeneous.................. panamensis male Fisher. 
§3..(Diskiofpronotum:black-orfuseous ius. sets SAM ak 20. Sea 
Disk of pronotum golden-green, with the sides cyaneous; elytra cyaneous; last 
abdominal segment of female with a small triangular notch in middle, a broad, 
angularly emarginate process on each side, and a small acute tooth on the out- 
side at alower devel: . 282. Lei es os Joo occ De bias) Waterhause: 
