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The céphalothorax is not ilistinctly produced anteriorhj. Two eyes or none. 

 Eleven abdominal tcrgitcs nisible from above. The coxae of the fourth pair of legs are 

 nol e.vcessiuelij large and not broader than long. The Irochantins of the femurs with 

 oblique articulate-membranes ; the tarsus of the fourth pair of legs is never longer than 

 the tibia. 



I. Characteristic of Genus. 



Céphalothorax. — The number of the eyes is two or none; Ihey are 

 sometimes well develojied with distinctly arched lenses and sometimes mere while 

 ocular spots, indistinctly limited from the rest of the integument, and often they 

 have left no trace whatever. It is in some cases difficult to distinguish between 

 real eyes and ocular spots, but it is even more difficult to see the difference 

 between ocular spots and no trace of eyes at all, at least in spirit-specimens: per- 

 haps sometimes variations in this respect are found within the species (cf. Balzan 

 12. p. 500). The shape of the céphalothorax differs only slightly; it is never 

 produced anteriorly in a marked degree and tapers usually gradually towards the 

 front; the lateral outlines are most often straight or slightly convex. The céphalo- 

 thorax is seldom in a very marked degree broader than long, or longer than broad, 

 but usually of almost equal breadth and length. A structure, which often gives 

 the céphalothorax a characteristic appearance is the transverse stripe or stripes; 

 these, which really are the limitations between the head and the first thoracic 

 tergite, and between the first and the second of these tergites, are most often 

 indistinct in species with poorly developed granulation or even wanting, but very 

 distinct in species with coarse granulation. The anterior is generally the better 

 developed and is often found, when the posterior is wanting; the latter is in 

 "Lophochernes Sim." generally the most distinct, making the second thoracic tergite 

 completely alike an abdominal one. The integument is most often more or less 

 granular, but sometimes almost completely smooth; besides the granules bigger 

 tubercles are sometimes found as in Ch. cancroides L. The hairs are never simple, 

 but always provided with a number of teeth ; they are sometimes clavate, being 

 dislally as broad as they are long; a row consisting of about four is placed along 

 anterior margin, and rows containing several hairs along hindmost margins of the 

 tergites; the hairs of the head in addition to the above mentioned are arranged 

 without proper order. 



Abdomen. — The abdomen is only seldom tlattened and almost as broad as 

 long, most often cylindric and distinctly longer, sometimes twice or more, than it 

 is broad ; the outlines are most often moderately convex, but sometimes almost 

 straight or strongly convex. The abdomen is sometimes longitudinally keeled in 

 the middle f. inst. in Ch. carinatus n. sp. ; the lateral margins of the first tergites 

 are in the males of most species of "Lophochernes Sim." prolonged into lateral keels 

 or teeth, a structure which will be described later on together with its variations. 

 The tergites of the abdomen are most often longitudinally divided by a narrow 



i 



