ON THE CHILOPODA OF NORTH AMERICA. 43 



stripes ; which so accurate an observer could scarcely fail to have noticed if they had 

 existed. As we have never seen a specimen of If. punctifrons, it is out of our power 

 to make a minute comparative diagnosis. 



259 I 2 I Bonin Islands. | N. Pacific Expl. Exp. | Wm. Stimpson, M. D. | Unc. 2i | 



M. pilosus. n. sp. — M. flavus, capite rubro; segmento cephalico antice emarginato, profunde punctata, a 

 fronte ordinatim angustato; capite mandibulis pedibus scutisque pilosis; mandibulis distincte tridenta- 

 tis ; pedum paribus proxime 38. 



The coloration of this species is almost identical with If. rubriceps. The puncta- 

 tions on the cephalic segment resemble those on M. punctifrons. The cephalic seg- 

 ment narrows more gradually from the front, with its anterior angles more rounded 

 and the emargination deeper than in If. rubriceps. The number of feet given above 

 is unfortunately only approximate, as the alcohol having dried off the specimen, it is 

 in a condition hardly fit to describe from. 



262 I 1 I Hong Kong. | N. Pacific. Expl. Exp. | Wm. Stimpson, M. D. | Unc. l\ | 



M. Tahitiensis, n. sp. — M. aurantiacus, capite saturate rubido-brunneo ; segmento cephalico, sparse pro- 

 funde punctata, a fronte sed postice illicius angustato, antice posticeque truncate ; mandibulis pilosis in- 

 distincte quadridenticulatis; labio leviter punctato, vix emarginato, haud canaliculate; antennis proximis 

 pilosis, ultimis pubescentibus ; pedibus elongatis, utrinque 47, pilosis, et superficie ventrali dilute 

 aurantiacis ; suturis sterno-episternalibus scuto-episcutalibusque indistinctis ; sternis suleo medio leviter 

 impressis ; pedum pari postremo elongato, gracilli. 



361 I 1 I Tahiti. I N. Pacific Expl. Exp. | Wm. Stimpson, M. D. | Unc. 1|. | 



M. spissus, n. sp. — M. dilute aurantiacus, robustus; capite saturate aurantiaco, punctato; segmento cephalico 

 magno, copiose profunde punctato, a fronte sed postice illicius angustato; mandibulis punctatis, maximis, 

 crassis, intus pilosis, singula denticulationibus 4 magnis obtusis; labio copiose profunde punctato, sparse 

 piloso, antice valde anguste emarginato, bidentato, medio valde canaliculate ; antennis brevibus sub- 

 acuminatis, sparsissime pilosis ; scutis irregulariter rugosis ; suturis scuto-episcutalibus indistinctis ; 

 sternis mediis canaliculars ; pedibus gracillibus subcompressis, breve pilosis, utrinque 44. 

 348 I 1 I Oahu or Kaiu. | Commodore Perry. | Unc. 



Gen. 2. GEOPHILUS, Leach.* 



Geophilus longicornes, Gervais, Apt. iv. p. 313. 

 Necrophlaeophagus, Newp., Proc. Zool. Soc. 1842, p. 180. 



Arthronomalus, Newp., Linn. Trans, xix. p. 430 ; et Catal. Brit. Mus. Myriap. p. 83 ; haud Geophilus 

 Newport et imitatores. 



Segmeutum cepbalicum subquadratum. Segmentum prebasale haud sejunctuui, sed basali abso- 

 lute coalitum. Segmenti basalis niargo posticus antico inulto latior. Segmentum subbasale 

 sejunctum. Mandibulae modicjc, interdum denticulate. Antennae capite multo lonfiores, 

 subapproximatre articulis inrequalibus. Labium plerumque emarginatum. (Fig. 10.) 



* Linn. Trans, xi. p. 384. 



Vie. 10. 



