TRIP.K II. IPIXI. 037 



102G (90G7). PITYOGEXES PLAC;IATUS Lee., 1SG8, 1G1. 



Less slender than hopkinsi. Ferruginous-brown, shining, thinly clothed 

 with long, erect hairs, antennae and legs paler. Antennae with smooth basal 

 portion of club smaller, sutures of apical portion nearly straight. Head 

 convex, punctured, with a triangular, opaque, pubescent, frontal spot. Tho- 

 rax scarcely longer than wide, sides parallel behind, then semicircularly 

 rounded with the apex; base very distinctly rounded towards the sides; 

 surface strongly roughened before the middle, finely but deeply punctured 

 behind, with a smooth oval space just behind the middle. Elytra strongly 

 but not densely punctured, punctures not in rows; declivity scarcely punc- 

 tured, suture elevated. Tibiae less dilated than usual, armed with a few 

 not very prominent teeth. Male, declivity of elytra deeply concave, with 

 margin semicircularly elevated from near tip to near suture, armed at its 

 upper limit with a robust horn, slightly hooked at tip, then with two 

 or three denticles, and ending below in a rather prominent tooth. Female, 

 declivity somewhat retuse each side, deeply sulcate and with a very small 

 denticle near the suture and a larger subacute tubercle near tip. Length 

 2 mm. 



Described from Maryland. District of Columbia on pines. 

 (Ulkc.) Marqnette, Mich., not rare. West Virginia, mining 

 under green bark on tops and branches of injured and dying 

 pines; adults. May and October. (Hopkins.) 



III. IPS* DeGeer, 1775. (Name of an insect.) 



Elytra 1 declivity deeply excavated and toothed ; prothorax 

 roughened in front. Differs from Xi/loclcptes by the deeply ex- 

 cavated declivity and second segment of antennal club not sur- 

 rounding the first; from Piti/of/ciu's by antennal club being not 

 pubescent on both sides, almost entirely corneous and usually 

 not annulated on inner face; funicle 5-jointed. 



SYNOPSIS OF SPECIES OF IPS. 



a. Larger, 3.5 6.4 mm. 



It. Sutures of antennal club strongly angulated. 



c. Margin of declivity with three teeth behind the most prominent 

 one. 1027. CALLIGRAPHUS. 



cc. Margin with two teeth behind the most prominent one. 



1028. GBANDICOLLIS. 



bl>. Sutures of antennal club not angulated, first nearly straight, second 

 bisinuate; marginal declivity with four prominent tubercles. 



1029. pixi.f 

 act. Smaller, 2.5 mm. 



el. Margin of declivity with two prominent tubercles. 1031. C.ELATUS. 

 dd. Margin of declivity with three prominent tubercles. 1032. AVULSTJS. 



*Equivalent to Toinicus Latr. Gen. Crust. & Ins., II, 1807, 276, and Tomicits Lee. 

 and Eichhoff, and of most economic literature, or nearly so. 



tSeveral closely allied species are here included; for the differences between them 

 see the descriptions. 



