18B8.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 509 



plates and the expansion of the pubic process, which in the uext series 

 becomes so prominently marked in some of the species. 



44. L. nova Smith. 



Oblong; slightly broader behind; chestnut brown, shining. Clypeue 

 moderately emarginate ; the border narrowly reflexed ; surface densely 

 and coarsely punctured; the front less densely so. Thorax gradually 

 narrowed from base to apex ; sides feebly arcuate ; the margin dis- 

 tinctly crenate; surface with distinct, irregular punctures ; sparse on the 

 disk where there are irregular, smooth spaces; more dense and equally 

 at the sides. Elytral punctures finer than those of the thorax; much 

 more closely placed; somewhat rugulose ; the costse feeble, but evi- 

 dent. Pygidium sparsely, finely, and indistinctly punctate. Meta- 

 sternum densely punctured; the hair not long nor dense; shorter in 

 the female. Abdomen sparsely punctate at the sides, the last two seg- 

 ments more coarsely. Claws curved; the tooth strong and median. 

 Last joint of maxillary palpi fusiform, not impressed. 



Length .55-.70 inch; 14-LS m ™. 



Habitat— New York, District of Columbia, North Carolina. 



Male.— Antennal club equal to or slightly longer than the funiculus. 

 Abdomen slightly flattened at middle ; penultimate segment with a 

 distinct, arcuate, granulated ridge, behind which the segment is deeply 

 impressed and punctured. Last segment with a cupuliform depression ; 

 inner spur of hind tibiae shorter and stouter than the outer. 



Female.— Antennal club shorter than the funiculus. Penultimate 

 ventral segment with a linear impression close to and parallel with 

 the hind margin. Hind tarsi slightly shorter than the male. 



This species is not uncommon at Washington, and has been very gen- 

 erally confused with fraterna, var. forsteri, with which it agrees in all 

 structural features. Apart from the primary differences-m the male 

 genitalia, this sex is always easily recognizable by the distinct arcuate 

 ridge of the penultimate segment. The same character is sometimes 

 approached in the var. forsteri, but is never so distinct The thoracic 

 margin in both sexes is more distinctly crenate, though this, is also in- 

 dicated in some forms of fraterna. n ,, , inn 



There are several specimens of both sexes in the Museum collection 

 from the localities above named. The genitalia of the male difif er from 

 those of fraterna most remarkably in size as well as in othei details. 

 The claspers are not more than one-half as large, much more frail m 

 appearance, and quite differently built. In the female, on «e contrary 

 lean find no differences from fraterna. The *»^_ "»*^ 

 alike so far as my observations go, and I have examined a considerable 



number of them. 



45. L. infidelis Horn. . ,, ( , 



The collection contains two female specimens from Georgia , (coll. <U 

 V. B.), presenting nothing at all peculiar. To Dr. Horn I o«c the .....1. 

 for study. 



