38 



BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



Koch's pennsylvanicus, concerning which he says: u Der Korperim Ver- 

 hdltniss zur Lange ziemlich breit, * * * die Seitenkanten der Seiten- 

 lappen glattrandig. 11 



This is all of his description that is of any value ; the first will fit 

 both species, while the last will only suit P. serratus, for the serratures 

 are present in P. branneri, although they are small. 



I have never seen a specimen of P. serratus with the serratures oblit- 

 erated, but concerning this Dr. Wood says:* "The serratures in the 

 lateral margins of the side plates are very minute and frequently obso- 

 lete;" and Professor Saussure:t " lis le sont en effet, mais si finement 

 qu J on ne distingue les dentelures qtCan moyen dn microscope ou dhme forte 

 loupe.'''' Judging from these quotations, I am inclined to believe that 

 P. p ennsylv aniens is identical with serratus, or, at any rate, a species 

 distinct from my branneri. 



I have examined a number of specimens collected by Mr. Charles B. 

 Branner, but most of them are broken. All the females in the collec- 

 tion are much smaller than the male, as the following measurements 

 will show : 



Measurements of Polydesmus branneri. 





Length 

 of body. 



Breadth 



Breadth 



Length 



Sex. 



of first 



of tenth 



o? 





segment. 



segment. 



antennae. 





mm. 



mm. 



mm. 



mm. 



d 



25.3 



2.6 



3.5 



4.6 



d 



24.8 



2.9 



3. 



4.3 



? 



18.6 



2.6 



2.9 



3.2 



7. Fontaria evides, sp. nov. 



Diagnosis. — Coxa of second pair of legs produced into a blunt, cylin- 

 drical lobe; only lateral carinse distinctly red. 



Type. — U. S. Nat. Museum. 



Habitat. — Mossy Creek, Jefferson County, Tenn. 



Description of type. — Black, lateral carinse, a spot on anterior border 

 of first and on posterior border of penultimate segments red, antenna:' 

 brown, legs yellow, tarsal joints reddish, an indistinct row of reddish 

 brown spots above lateral carinas. Body depressed, anterior segments 

 of male not attenuated, those of female very noticeable; first four seg- 

 ments moderately smooth, rest rough except along middle of back. 

 Vertex, sulcus shallow, setigerous foveolae present. Antennae of male 

 somewhat clavate, female filiform. First segment as in Fontaria virgin? 

 iensis. Lateral carinse large and moderately produced. Bepugnatorial 

 pore rather large and placed on the upper edge of posterior third ol 

 carina?. Ventral plate and coxa unarmed. Male: Coxa of first pair of 

 feet produced into a blunt, cylindrical lobe, coxa of fourth pair moder- 

 ately; femur of anterior legs swollen above; genitalia loosely coiled, 



*Traus. Amer. Philo:s. Soc, 216, 1865. tEssai d. Farm., Myr. Mex., 68, 1860. 



