288 THE CANADIAN ENTOMOLOGIST. 



with spot at vertex ; eyes distant, very narrowly margined with black ; 

 antenna 1 dark, with basal joints paler (two or three in mature specimens), 

 reaching to about hind coxa in £ , shorter in 9 ; thorax narrowed towards 

 the front, yellow, closely punctate, especially on dark parts, the M taking 

 the form of three longitudinal dark stripes, the side one sometimes 

 enclosing a small yellow spot, and the- central one a median yellow line 

 not reaching the rear, all three stripes usually reach the rear margin, 

 though sometimes the side ones do so only partially, the transverse depres- 

 sion well marked at the ends of the side stripes ; the lateral yellow margin 

 is wider and almost smooth, the edge is almost straight in ^ , slightly 

 curved in 9 ; elytra yellow, with almost regular striae of black punctures, 

 stightly confused in the vicinity of the scutel, and the punctures so 

 disposed as to show a biseriate tendency, the fifth and sixth rows joined 

 just before the convexity, next pair a little longer, and last pair still longer. 

 This gives the effect of having the fourth interval open to the tip; suture 

 narrowly black, also a black stripe covering the humeral interval and 

 running from the humerus nearly to tip, the rear end sometimes broken or 

 diffused ; marginal stria well curved .it lobe, then straight, lobe well 

 developed, with a fine row of black punctures on the curve, the pale part 

 of the lobe widest in front ; below black, with yellow epimera and sides of 

 abdomen, the last segment and pygidium yellow, with central dark line, 

 legs yellow, with more or less darker clouds. Comes near minutus, Jac. 

 Three 3 's, 4 9 's, Manatee Disk, Brit Honduras, Peck. Type 

 coll., Bowditch. 



Pachyhrachys signatus, nov. sp. — Medium size, shining, form of 

 livens, Lee; colour whitish-yellow with black markings, which are quite 

 variable; the tj pical form has on the thorax a black median mark, divided 

 in front, similar in shape to the thoracic mark on livens, Lee; the elytra 

 have in front a black U-shaped mark with the arms resting about the 

 middle of the base and crossing the suture just before the shield, also the 

 rear standard spots are diffused so as to form a transverse band ; these 

 markings vary, as subsequently stated. Length 2-2)2 rnm. 



Head light yellow, flat, widi a dark frontal and vertex mark and 

 moderately punctured, eyes distant, antennae yellow, thorax much wider 

 than long, somewhat narrowed in front, rather thickly and evenly punc- 

 tured, transverse depression well marked before the scutel, sides subangu- 

 late in 9 , very lightly in £ ; in addition to the black mark mentioned 

 above, there are indications of the two side M arms, and in one example 

 the thorax is quite suffused with black, hind angles obtuse, elytra with the 



