I'Ji lATAI.OGUE OF 



Abdomen blackish aixi nijTulose above. Cerci blackisb, short, slender. Legs 

 lawny, very stout ; fore libice with two small spines on the outer side beyond 

 the middle and with one lar;;er spine uu the inner side near the tip; middle 

 tibia.' wiih three spines on the outer side and with one spine on the inner 

 side; hind tibia; with four spines on the outer side and with five on the 

 inner side, the fifih very small. Len;;th of the body 12 lines. 



1 1 is apterous, and may be the male of the preceding species. It agrees 

 generally wiih the description of S. mexicaints, but the description of the 

 latter does not quite accord with the specimen here recorded. 



a. Mexico. Presented by E. P. Cotfiu, Esq. 



Group 6. 



Mas. Corpus robustum, glabrum. Caput magnum, prolborace 

 latius, inter antennas bicarinulalum, antice subpunclatum ; vertex tri- 

 lineatus; labrnin sat magnum. Palpi niaxillares longi, -iraciles. Piolhorax 

 antice latior, sulcis duobus transversis, 2a interru|)ia, margiuibus aulico et 

 postico subcxcuvatis, lateribus fere reclis. Abdou)en bul)compressum, pro- 

 thorace anguslius ct plus duplo lougius; sexualia parva. Pedes crassi, 

 setulosi, brcviusculi ; I'emora postica subtus quiuquespinosa ; tibia; antica; 

 supra subtusque bispiuoss ; tibiae posticae extus quadrispiuosie, intus 

 quinquespinosu;. 



Male. Body stout, convex, sranolb, shining. Head larae, broader 

 than the proihorax, with three slightly impressed longitudinal lines on the 

 vertex; two short slight keels between the eyes; fore part vertical, very 

 slightly and thinly punctured; labriim rather large. Eyes pyriform, rather 

 small, slightly prominent. Maxillary palpi long, slender. Third joint of 

 the labial palpi clavale, not longer than ihe second, with a distinct apical 

 vesicle. Proihorax transverse, broader in iVunt, with two transverse furrows, 

 the first near the fore border, the second iutcrrupied in the middle ; border 

 slightly rertexed ; fore border and hind border slightly excavated; sides 

 nearly straight, .\bdomen slightly compressed, narrower ihan the prothorax 

 and more than twice its length; apical appemlajres small. Cerci of the 

 usual size. Legs thick, setulose, rather short ; hind femora with five very 

 minute s])ines bencaih; fore tibia< with two small spines beneath and with 

 two largtr spines above; liind tibiae with four small spines on the outer 

 side anil with live on the inner side; tarsi slender; third joint vciy short. 



15. SlENOPELXIATLS rALLIDlS. 



RLi*;. J'allidc lestaceus ; mandibulat apice niyrce ; abdominis segmenta 

 pivio fusciata. 



Male. Pale testaceous. Mandibles with black lij>s. Abdomen with 

 a pictoiis band on the hind border of each segment. Spiues and claws 

 with black tips. Length ol the body 11 Hues. 



«. ? Presented by the Lords of the Admiralty. 



Group 7. 



Mas. Corpus crassum, glabrum. Caput maximum, protborace latius, 

 antice |iuuctatum ct bicarinulalum ; vertex valde rotundatus ; labrum sat 



