156 



UNITED STATES NATIONAL MUSEUM BULLETIN 207 



which, except for somewhat larger expanse (32 mm.) 

 than average eastern specimens, are typical zimmermani 

 in coloration and genitalia. The unfortunate reference 

 to ponderosae in the Keen paper (1938) was due to my 

 misidentification of reared specimens from the reforesta- 

 tion areas of Nebraska. These came to us in good 

 series but were spread and the raised scales on the fore- 

 wings had been flattened, and on most of the examples 

 (as also on some eastern specimens) the characteristic 

 red shading on basal area of forewing was lacking. 

 Superficially they looked like ponderosae; but had the 

 typical zimmermani genitalia, and unrubbed examples 

 clearly showed the raised scaling. 



Economically zimmermani is our most important 

 Dioryctria. In this country it does more serious dam- 

 age, especially to young trees, in both the East and the 

 West, than abietella. As far as I know it is strictly a 

 bark borer and does not attack the cones. The most 

 complete and accurate account of the life history is that 

 in the Craighead (1950) paper. The life history of the 

 insect in Nebraska is also treated in the Keen (1938) 

 paper under "ponderosae." 



318. Dioryctria cambiicola (Dyar) 

 Figures 390, 876 



Pinipestis cambiicola Dyar, Ins. Insc. Menstr., vol. 2, p. 2, 

 1914.— McDunnough, Check list, No. 6137, 1939. 



Maxillary palpus of male squamous. 



Forewing as in zimmermani except: Ground color of 

 basal, submedial and terminal areas a dark, dull, reddish 

 brown (somewhat paler on Arizona specimens); the 

 black scaling greatly reduced; the white scaling follow- 

 ing antemedial and preceding subterminal lines and 

 bordering terminal margin; the transverse lines and 

 the discal mark, dull silvery. Hind wing smoky fuscous ; 

 the veins darkened and a dark line along termen. Alar 

 expanse, 28-32 mm. 



Genitalia, male and female, show no specific differ- 

 ences from those of zimmermani. The extent of the 

 bend in the female ductus bursae shown by the figures 

 is purely individual and can be easily accented or 

 diminished in preparing the slides. 



Type localitt: Flathead Reservation, Mont, (type 

 inUSNM). 



Food plants: Finns ponderosae, P. scopulorum, P. 

 covlteri. The larvae are cambium borers in new growth, 

 causing pitch exudations like those of zimmermani. 



Distbibution: Montana, Flathead Reservation (July, 

 Aug.); Missoula (July); Colorado, Boulder (Sept.), 

 Palmer Park (July, Aug.); New Mexico, Las Vegas; 

 Arizona, Flagstaff, White Mts. (Aug.) ; California, 

 Julian (Sept.). 



The species is doubtfully distinct from zimmermani 

 except as a possible race. It differs chiefly in its dark 

 hind wings. It apparently has a limited distribution 

 in our Western States. In his original description Dyar 

 mentions an eastern specimen (presumably from Wash- 

 ington, D. C.) reared from a cone of Pinus taeda, Aug. 

 14, 1882. I have also before me a similar female from 

 Cape Henry, reared June 9, 1927. I suspect that both 



these examples may be hybrids of zimmermani and 

 amatella. 



319. Dioryctria amatella (Hulst) 

 Figure 879 



Nephopteryx amatella Hulst, Ent. Amer., vol. 3, p. 131, 1887. 

 Dioryctria amatella (Hulst), Ragonot, Ent. Amer., vol. 5, p. 114, 



1889; Monograph, pt. 1, p. 191, 1893.— Craighead, U. S. 



Dep. Agr. Misc. Publ. 657, 1950. 

 Pinipestis amatella (Hulst), Phycitidae of N. Amer., p. 136, 



1890.— McDunnough, Check list. No. 6135, 1939. 



Maxillary palpus of male squamous. 



Forewing with raised scales as in zimmermani but the 

 scale ridges somewhat narrower; ground color a dark 

 wood brown; transverse lines, discal spot, a thin trans- 

 verse band preceding the subbasal ridge, a blotch fol- 

 lowing the antemedial line, a similar shade near inner 

 margin of subterminal line on lower half of wing, and 

 a thin zigzag pale shade just within terminal margin, 

 silvery white and strongly contrasted against the 

 ground color; black scaling limited to the subbasal and 

 submedian scale ridges, the thin borders of the trans- 

 verse lines, a spot at extreme base, and the thin terminal 

 line. Hind wing smoky with a somewhat glossy pale 

 brownish tint; the veins slightly darkened and a thin 

 dark line along terminal margin. Alar expanse, 27- 

 32 mm. 



Genitalia essentially like those of zimmermani. 



Type localitt: Florida (type in AMNH, ex Rutgers). 



Food plants: Pinus spp. Larvae feeding in cones 

 and terminals, more often in the cones than terminals and 

 apparently favoring diseased cones. 



Distribution: Florida, Alton (June), Camp Pinchot 

 (June), Fort Mead (May), Lake City (May, June), 

 Monticello (Sept.), Orlando (June), "Southern Florida" 

 (June, July), Starke (May); Louisiana, New Orleans 

 (Sept., Nov.), Woodworth (June) ; Texas, Conroe (May) ; 

 Mississippi, Hattiesburg (June), Picayune (May); 

 Maryland, Baltimore (Aug.); District oj Columbia, 

 Washington (July). 



Close to but apparently distinct from zimmermani 

 and cambiicola, distinguished from both by the strong 

 contrast of its white markings. Generally distributed 

 in the Gulf States where its abundance, especially in 

 Florida and Louisiana, makes it something of a pest. A 

 brief accoimt of what is known of its fife history is given 

 in the Craighead (1950) paper. 



320. Dioryctria albovittella (Hulst) 

 Figure 880 



Pinipestis albovittella Hulst, Phycitidae of N. Amer. p. 138, 

 1900. — Barnes and MclDunnough, Contributions, vol. 4, p. 

 174, 1918.— McDunnough, Check list, No. 6138, 1939. 



Dioryctria albovittella Ragonot, Monograph, pt. 1, p. 193, 1893. 



Maxillary palpus of male squamous. 



Forewing with a narrow black subbasal scale ridge, 

 little if any raised scaling otherwise; forewing gray 

 densely dusted with white, making the extreme basal, 

 median, and terminal areas a pale ash color; transverse 

 lines and discal mark well contrasted, white; antemedial 

 line nearly vertical, slightly notched above and below 



