Page:Supplement to harvesting ants and trap-door spiders (IA supplementtoharv00mogg).pdf/148

 In the Mentone Spider there are three orange-yellow-brown well-defined bars or longitudinal lines between the ocular area and the thoracic fovea; the central bar tapers and reaches from the eyes to the fovea, the lateral ones never more than two-thirds of the distance from it to the eyes, diverging a little from the central bar as they run forwards. These two lateral bars are not straight, i.e., their margins are more or less notched or roughly angular, forming in some examples a line of a somewhat zigzag or bent character. It may perhaps be observed that when the two dark brown lines which run along the broad orange-yellow-brown band on the caput of the Montpellier spider, are well marked, this also leaves three longitudinal yellow lines, somewhat similar to those just described in the Mentone species, but there is this difference even then (and it is constant throughout a long series of examples), the lateral lines in the Montpellier spider always run through to the eyes, equalling in length the central line, while in the Mentone spider the ''lateral bars never reach the eyes'', always stopping short of the ocular area, by one-half, or nearly so, of their length.

Another distinction which appears constant is the form of the thoracic fovea; in the Montpellier species this forms a slight but uniform curve; in the Mentone spider it is more sharply bent at the apex (or centre of the curve), forming in most examples a bluntish-angular line.

In the eyes there appears to be but little reliable difference; if there be any at all constant, it seems to be that in the present (Mentone) species the fore-laterals are constantly smaller than the hind-laterals, and sometimes smaller than the fore-centrals. A close