51 



Cryptobium sanguinicolle, Bernh. 

 In general appearance this species is close to C. mastersi, except that the 

 elytra are uniformly dark ; the specimens before me are from Townsville, 

 Mackay, and the Coen River. 



Cryptobium fractum, Fvl. 

 A specimen, from Bowen, probably belongs to this species, but differs from 

 typical ones in having the prothorax and base of head of a dingy red, possibly 

 from immaturity. 



Cryptobium hoplogastrum, n. sp. Figs. 27 and 32. 



d • Black ; mandibles red, most of femora fiavous, rest of legs deeply 

 infuscated, maxillary palpi with apical joint fiavous, basal ones reddish, the 

 others infuscated. Head, sides of prothorax and of elytra, and sides and apex 

 of abdomen with dark straggling hairs, elytra with very short pubescence, 

 somewhat longer on abdomen. 



Head subquadrate, hind angles rounded off; a deep median line in front, 

 becoming liner and disappearing about one-third from neck ; with large and 

 numerous but irregularly distributed punctures. Mandibles long, with an acutely 

 tricuspidate tooth near middle. Antennae with basal joint as long as four fol- 

 lowing combined. Prothorax slightly longer than wide, slightly narrower than 

 head, almost parallel-sided, angles slightly rounded off; with an irregular row 

 of rather large punctures on each side of middle, the sides with more numerous 

 ones. Elytra slightly wider than head, about once and one-third the length of 

 prothorax ; with dense and sharply-defined punctures of moderate size. Abdomen 

 with rather small, sparse, and rugose punctures, but becoming larger on under- 

 surface, third segment on under-surface with a large acute process, passing 

 fourth and overhanging base of fifth segment, sixth triangularly notched at 

 apex. Length, 7-8 mm. 



9 . Differs in having the head smaller and less quadrate, without the 

 median line, prothorax as wide as head and abdomen simple. 



Hab. — Western Australia: Swan River and Bunbury (A. M. Lea). 



Differs from C. fractum and C. varicorne in being more robust, with 

 notably coarser punctures and somewhat shorter prothorax, but from those and 

 all other species known to me it is -abundantly distinct by the remarkable 

 armature of the male abdomen. On the type the tips of the antennae and of 

 the abdomen are obscurely diluted with red. Another male, which agrees per- 

 fectly in structure with the type, may be immature, parts of its abdomen 

 (including the remarkable process), the shoulders, and tips of elytra are 

 obscurely reddish, and the prothorax still more obscurely so. 



Cryptobium bicuspidatum, n. sp. Fig. 28. 



d . Shining black ; mandibles and elytra red, legs flavous, tibiae and coxae 

 more or less deeply infuscated, two or three basal joints of antennae reddish, 

 two or three apical ones obscurely flavous, the intervening ones deeply infuscated. 

 Head, sides of prothorax and of elytra, sides and apex of abdomen, with 

 straggling dark hairs, elytra and abdomen rather sparsely pilose. 



Head moderately long, narrower in front of than behind eyes ; with large 

 and numerous punctures, sparser between antennae than elsewhere. Mandibles 

 long and acute, about middle with an acutely bicuspidate tooth. Antennae 

 with first joint about as long as four following combined, second and third sub- 

 equal, fourth to tenth subglobular, becoming feebly transverse, eleventh slightly 



