ii\ THE CHILOPODA OF NORTH AMERICA. 



15 



Gen. 2. BOTHROPOLYS,* (n.g.) 



Antennae multiarticulatae. Caput latum. Ocelli numerosi. Labium anticc 1 ratieulatum, medio sulcatum, 

 emarginatum. Coxaruui excavationcs, parvi, fere rotundi punctiformesque, in - :rii bus 3 — I dispositre. 

 (Fig. 6.) 



11. N obi lis, d. >\>- — 1!. brum mento cepbLilico postice margine elevato; antennis elongatis, sparse 



pilosis, subsegmento impunctato, articulis basalibus I loDgitudine fere Eequalibus; laminis dentalibus 

 distinctis, margine antioo subrotundato, angulis aoticis externis subproductis, denticulis 12 — 19; ocellis 

 utrinque 32 — 37 ; scutorum anticorum margioibus et pustkis el lateralibus elevatis sed scutorum posti 

 coruui lateralibus solum. 



The anterior scuta have their posterior m irg'tns almost straight and elevated. The 

 labial teeth are generally large and acute, but rarely coadnate. The 

 number of pairs of eyes appears to vary, even in the adult, from 32 — 

 7 : perhaps 35 is the most common number. The feet are in most 

 individuals of the same color as the body, but they are occasionally 

 yellow. The posterior portions of the sterna areoften furnished with 

 stiff hairs. The articular spines are of moderate size. To show the 

 variations in number of the labial teeth, we append the following list of the numbers 

 in one lot from South Illinois: — 



6 specimens with 14 teeth each, 

 •• L3 " ' : 



1 specimen " 19 " " 



I .. .. 15 .. u 



The geographical range of this species is extensive. We have found it around 

 Philadelphia; and it is in the Smithsonian collection, from Illinois and Missouri. 



/ /■> Smithsonian Institution. 



12 | S >nta Illinois. 

 1 St. Louis, Mo 



R. Kennii 



Dr. Eogelmann. 



Lin. 8—12. 



" 7 — 11. 



II. Xanti. ii. sp — B. brunneus, segincnto cepbalico polito aurantiaco, margine postico elevato; antennis 

 pilosis; ocellis utrinque I s ; laminis dentalibus margine antico rotundato, denticulis 16 — 18, nigri.s, 

 acutis; scutis valde asperatis, alternis majoribus | dde emarginatis, — alternis minoribus margite 



pi -tico fere recto sed angulis posticis acutis et valde prudu 



The head is rather large, with a curved suture running transversely from one set 

 icelli to the other, having its convexity directed posteriorly. The first scuta 

 approximates the head in color, has its posterior margin strongly raised, and is only 

 slightly roughened. The other large scuta are very rough, with (sometimes indistinct 

 but generally well marked) ruga', converging towards the median line anteriorly. 

 The last scuta is, however, without rugae, and but slightly roughened. It is much 

 narrowed anteriorly and posteriorly, and somewhat elongate. Preanal sterna almost 

 circular, with two lateral curved impressions and a central shorter straight one, which 



, fovea ; a-cXire, multus. 



