56 MEMOIRS ON THE COLEOPTERA 



New Jersey and Canada to Kansas. Very abundant, the males 

 between a third and half as numerous as the females. [Melolontha 



arboricola Fabr.] arboricola Fabr. 



A Similar but a little smaller and rather notably less stout, especially 

 in the female, similar in coloration and with the prothorax of the 

 female nearly similar, being moderately pubescent, shining be- 

 tween the punctures and metallic laterally, but differing very 

 much in the pronotum of the male, which is entirely black, without 

 metallic lustre and with the erect pubescence longer, paler and 

 much denser, being very conspicuous; in both sexes the pygidium 

 differs in being duller, more closely sculptured, more pubescent 

 and with the subapical tumidity very much more obtuse and in- 

 distinct. Length (c?) 9.0-9.2, (?) 9.0-10.5 mm.; width (cf) 4.5, 

 (9) 4.2-5.0 mm. Rhode Island (Watch Hill). Three males 



and seven females puritana n. subsp. 



B Nearly similar to arboricola but a little smaller and more oblong, 

 the elytra being almost parallel, the pygidium nearly similar and 

 with distinct subapical tumidity, but more angulate at apex; 

 prothorax more densely sculptured in the male but with the erect 

 pubescence nearly similar and not so dense or conspicuous as in 

 puritana; female dimorphic in color, entirely pale or black, in 

 the latter case having the pronotum pale at the sides, but the 

 summits of all the elytral ridges are black. Length (cf) 9.0, 

 (9) 7.8-9.2 mm.; width (cf) 4.2, (9) 3-9~5-O mm. Virginia 

 (Nelson Co.). One male and seven pale and seven dark females. 



virginica n. subsp. 



C General outline as in arboricola but shorter and much smaller, 

 similar in coloration, except that the elytra are rather paler flavate; 

 head and prothorax nearly similar, the sparse punctures of the 

 latter rather smaller and feebler and the lateral fossae somewhat 

 feebler, in fact almost vestigial; elytra differing greatly, barely at 

 all longer than wide and more feebly cuneiform, irregular in sculp- 

 ture, the fourth and eighth ridges slightly wider, the eighth with a 

 single series of coarse punctures, space between the first and 

 fourth ridges with two fine ridges, separated by a row of large and 

 deep, impressed punctures; pygidium closely and intricately 

 transverso-lineate, the subapical tumidity less distinctly defined; 

 antennal club very small, barely twice as long as thick, oval. 

 Length (9 ) 8.2 mm.; width 4. 8 mm. New Jersey. One specimen. 



irregularis n. subsp. 



Body in form as in arboricola. Head, pronotum and scutellum bright 

 green, the second with pale side margins, the legs pale, with greenish 

 lustre, the front and middle femora entirely, and the lower half of 

 the hind femora, of a bluish black; body pale testaceous, the under 

 surface black, the pygidium, tarsi and upper half of the hind femora 

 testaceous, with greenish lustre; elytra pale, the suture greenish, 

 the lateral costae piceous; head coarsely and densely punctate, the 

 clypeal suture obliterated, the edges moderately reflexed; prothorax 

 not quite twice as wide as long, the sides feebly arcuate; apical angles 

 subacute, the basal rounded; surface coarsely punctate, densely 



