HEEMANNIA PICEA. 449 



as the name of the species, but although Koch's con- 

 vexus and his piceus were probably the same creature, 

 the latter being small specimens, yet I think convexus 

 is the more typical form and would have been the 

 better name to adopt, but the species is now known as 

 "pz'cea" (or ^'piceus'*), and therefore I retain it. 

 Nicolet's crassipes certainly possesses some of the cha- 

 racters of each of Koch's species. 



This is a large, clumsy-looking species, with the 

 abdomen very much arched and the whole creature 

 very thick (from the dorsal to the ventral surface). 



Colour black. 



Texture rough and dull, coarsely dotted. 



Cephalothorax broad and heavy, not much less wide 

 than the abdomen ; the frons, which is small, is dis- 

 tinctly divided from the dorso-vertex by a transverse 

 sulcation (the provertex not showing), and there is 

 another strong transverse sulcation on the dorso-vertex, 

 a little in front of the pseudo-stigmata. Thus the 

 cephalothorax is divided into three portions, each of 

 which is arched and rounded. Rostrum broad and 

 deep ; the genee form very slight projections on the 

 epistome. Rostral hairs rather fine, set high up and 

 rather near together. No trace of lamellae, but the 

 lamellar hairs persist, and are near together, thick, and 

 slightly spatulate. The maxillas are very strong, tri- 

 dentate, with the teeth deeply cut (fig. 4 is perhaps 

 hardly strong enough in the dentition). Pseudo- 

 stigmata lateral, placed far forward, only slightly 

 projecting, not large. Vseudo-stigmatic organs long^ 

 apparently filiform, but when seen from behind or in 

 front with a high power slightly clavate ; they take 

 a slight turn or form a shoulder, where they enter the 

 pseudo-stigmata (fig. 5). Interlamellar hairs thick 

 and spatulate, slightly curved ; much shorter than the 

 pseudo-stigmatic organs ; tectopedia almost obsolete. 

 Apodemata very strong, and joined to the sternum ; 

 those in front of the fourth legs are apparently double 

 when seen by a high power, and between the two 



VOL. II. 29 



