102 



sparse, small and numerous about the summit; a distinct, transverse impres- 

 sion behind the summit; the caudal half with the punctures very close, 

 deep, moderate in size, with a complete, smooth median line and a small 

 smooth spot on each side. The elytra have the sides nearly straight, sub- 

 parallel, moderately narrowed on the caudal third, rather narrowly rounded 

 behind; the punctuation moderate in size, deep, rather close, fairly regular 

 except near the suture where it becomes somewhat confused; smaller behind 

 near the declivity, smaller and very dense near the sides; the declivity 

 broadly rather feebly ^Icate, the sulcus smooth and shining, the suture 

 slightly coarser than in confinis, very feebly granulate-setose, the lateral 

 convexities similarly very feebly granulate-setose in two rows, the apex 

 distinctly more narrowly rounded than in confinis. 



The male has the front of the head convex, coarsely, closely punctured; 

 the epistoma broadly impressed, more finely punctured; the pubescence 

 sparse and fine, closer on the epistoma; with a shining, obtuse, longitudinal, 

 postepistomal median carina (feebly developed in some individuals). 



Type. — San Diego, California; Pinus torreyana, female, 2945, collected 

 by Ralph Hopping; nine paratypes, same labels. Type No. 107. 



Host tree. — Pinus torreyana. 

 Distribution. — San Diego, California. 



Pityophthorus cariniceps Lee; Am. Phil. Soc. Proc, 15: 353, 1876. 



Length, 2-5 mm. A large and very distinct species; connected with 

 the nitidulus group through canadensis. 



Host trees. — Pines. 



Distribution. — Eastern United States; Nova Scotia. 



Pityophthorus canadensis Sw.; Dom. Ent. Br., Dept. Agric, 14: 24, 1917. 



Of the size and shape of cariniceps Lee, and apparently replacing that 

 species in Quebec and Ontario. 



Host trees. — White Pine and Red Pine. 



Distribution. — Quebec, O^ntario. Breeding in dying small branches. 



Pityophthorus intextus Sw.; Dom. Ent. Br., Dept. Agric, Bull. 14: 29, 1917. 

 The length, 1-8 mm.; the width slightly more than one-third the 

 length; the declivity sulcato-retuse, with long bristles. 



Host trees. — Spruce and Larch. 



Distribution. — Northern Alberta and northeastern British Columbia. 



Pityophthorus pulchellus Eichh., Berl. Ent. Zeit., 275, 1868; herticeps Lee, 

 Am. Phil. Soc. Proc, 17: 623, 665, 1878; pusio Lee, loc. cit. 



P. pusio Lee. is known by the type and a short series from the Eastern 

 United States. P. herticeps Lee is probably the same species, and both 

 are apparently synonymous with pulchellus Eichh., which is the oldest 

 name. 



The front of the male is coarsely punctured, and that of the female is 

 densely clothed with long yellow hairs. The elytral declivity is moderately 

 produced, with the suture well developed. It is allied to tuberculatus 

 Eichh., but with the declivity more acute, the suture coarser, and the 

 pronotum less narrowly rounded in front. Length, 1 • 6 mm. 



Distribution. — Washington, D.C.; Pennsylvania; Long Island. 



