164 Psyche [December 



Members of this genus are easily recognized by their thick, 

 rugose, spinous antennae. 



Dictyonota tricornis Schrank, var. americana var. nov. 



Head, and disc of pronotum black, nervures brown, membrane 

 between the nervures gray. Legs and body beneath very dark 

 brown, antennae black. Anteocular processes spinose, slightly 

 curved, strongly divergent, frontal spines slender, convergent, 

 as long as the first antennal segment. Antenna! segments of 

 equal thickness, rough and setose. Pronotal hood transverse, 

 with two or three rows of areoles dorsally, not projecting over 

 the head. The three longitudinal pronotal carinae uniseriate, 

 sub-parallel, extending from the hood to the posterior edge of the 

 angulate process of the pronotum. Disc of pronotum punctate, 

 transversely convex, narrowed anteriorly, lateral expansions with 

 three to four rows of areoles, not produced anteriorly beyond the 

 eyes, somewhat reflexed, concave above. Hemielytra without 

 discal elevations, the costal vein depressed, those bounding the 

 discoidal area sharply raised; costal area as wide as the discoidal, 

 with two slightly irregular rows of areoles; subcostal area with 

 two rows anteriorly, one posteriorly; discoidal area extending nearly 

 to apex of abdomen, with three slightly irregular rows of areoles, 

 its inner border curved. Pleurre and bucculse reticulate, the 

 latter open anteriorly and evenly rounded posteriorly; sternal 

 ridges but slightly elevated; rostrum extending a little beyond the 

 metasternum. Orifices absent. Ventral abdominal segments 

 each with an anterior finely shagreened area, behind which are a 

 few curved striae connecting the posterior angles. Males with 

 two strong copulatory hooks at apex of abdomen. Form oval. 

 Length 3 mm.; width 1.2 mm. 



Holotype cT, Eastport, Me., 15 July, 1909 (C. W. Johnson), 

 in my collection; paratypes, 2 d^cT, Machias, Me., 26 July, 

 1906 (C. W. Johnson); Roque Bluff, Me., 15 July, 1907 (J. A. 

 Cushman), in the collection of the Boston Society of Natural 

 History. 



This form differs from typical tricornis (crassicornis Fall.) as 

 follows: in shape it is a little more elongate; the lateral ex- 

 pansions of the thorax are a little wider; the anteocular spines 

 are more divergent; the hood is a little more elevated; the costal 



