Life Histories of North American Geometridae—XXI

Psyche: A Journal of Entomology, Jul 2018

Harrison G. Dyar

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Life Histories of North American Geometridae—XXI

International Journal of species has been frequently Diapheromera mesillana sp. nov. LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.--XXI. BY HARRISON G. DYAR WASHINGTON D. C. iaheromera vdii Walsh 1 Proc. ent. soc. Philad. 1 ). Originally described from Nebraska 1 since then reported only from that state 1 Virginia Wirt Robinson) 1 Georgia (Morrison) 1 Southern Illinois (Thomas) 1 Man- itoba 1 Dallas Co. 1 Jefferson 1 Iowa (Allen) 1 Lincoln 1 Valentine 1 Sand Hills 1 Nebr. (Bruner) 1 Platte River 1 Nebr. (Hayden) 1 Barber Co. 1 Kans. (Bruner) 1 Dallas 1 Tex. (Boll) 1 Ringgold Barracks 1 Tex. (Schott) 1 Pecos River (Capt. Pope) 1 Albuquerque 1 N. Mex. (Bruner) 1 Sancelito 1 Mex. (Palmer) 1 San Pedro 1 Montelovez 1 Coahuila 1 Mex. (Palmer) 1 Venis Mecas 1 Sierra San Miguelito 1 San Luis Potosi 1 Mex. (Palmer). 1 0 (A. P. Morse) 1 Between Mesilla and Las Cruces , N. Mex., June '. Slenderer than D.femorata, uniform greenish flavous, the antennae infuscated beyond the basal third, the thorax smooth, vith an obscure median carina; subapical inferior spine of middle and hind femora rather slight. Mesothorax and metathorax (including median segment) of equal length. Seventla and ninth abdominal segments subequal in length and distinctly longer than the eighth, all equal in width and nowhere enlarged, the ninth rather feebly and angularly emarginate, exposing a small, transverse, apically arcuate, supraanal plate cerci about as long as the ninth abdominal segment, rigidly straight, directed backward and not at all downward, slender, tapering, blunt tipped, externally convex, and internally concave. Length of body, 55 mm.; head, 3 ram. antennae, circa 37 mm.; mesothorax, 12.5 ram. fore femora, 14.5 ram. middle femora, ram. hind femora, I3.5 ram. - LIFE HISTORIES OF NORTH AMERICAN GEOMETRIDAE.--XXI. BY HARRISON G. DYAR WASHINGTON D. C. ludule mendica Walk. This larva has proved unusually difficult and for no real reason. _/ks early as I871 Mr. W. Saunders published on the first stage, but was unable to go further as he could find nothing that the larvae would eat. I have tried the same experiment with equal ill success, till the fortunate discovery of the food plant by Mr. Lucock (Can. ent., xxx, 248, 1898) rendered the whole matter simple. The food plant was also independently discovered by Mr. W. D. Kearfott, who has kindly presented to me an inflated larva and pupa shells. The first stage has been described by Saunders, the last by Lucock, both briefly and the pupa has been remarked on by Hulst and Smith. /gg. Suspended on a slender silken fibre which runs from one object to another so that the egg swings free in the air. In nature the eggs were found laid on sheep’s wool stuck on the base of a tree in a pasture, on horse hair in a similar location and on spider webs under the edges of rocks. Elliptical, flattened slightly on tvo sides but not so much as usual. Reticulations represented by rather smooth shallow dents, just indicated. The whole surface besides very finely but distinctly shagreened, the little flattened elevations all quite regular, rounded; slightly shining, pale yellowish, changing to pinkish yellow; size .8 X .6 X .5 mm. Eggs from Keene Valley, New York, June sth; Jefferson Highlands, New Hampshire, June 3oth; Washington, D. C., May 3st. Stage I. Very long, slender and looping with great rapidity till the food plant is found; when disturbed suddenly curl up in an irregular S-shape and keep still. Of norreal Geometrid structure, abdominal feet on joints IO and 3; segments annulate, not very regularly. Tubercles moderate, distinct, dark, a little elevated, normal, and ii in line, iii above and before the spiracle, iv behind and below it, v sub-ventral; no subprimaries. Setae short, stiff with small glandular tips. Head blackish; body sordid yellowish vhite, rather translucent. After eating, sordid grayish green, feet pale; no marks. At the end of the stage a broad irregularly powdery subdorsal band appears. Stage II. Head strongly bilobed, round, flattened before, free from joint 2; black, lighter on the apices of the lobes before; width .6 ram. Body moderately slender, uniform, finely, but not distinctly, nunerously annulate. Anal flap truncate, notched, anal feet with small plates; shields uncornifled, concolorous. Tubercles small, black, iv on the elongated segments (5 to o), on a large, rounded, elevated, black base; all distinct. Setae short, black, club-shaped at tip. Whitish, faintly green fi’om the food a broad, diffuse, pulverulent purple-brown subdorsal band on joints 2 to 3, the feet also marked slightly with this color and tubercle iv surrounded by it. Spiracles black; feet normal. Stage. III. Head rounded, slightly squared at apex, not bilobed, erect, free from joint 2; black, whitish marked over the clypeus and in an erect line to the top of each lobe, joined by a transverse bar above the clypeus width .8 mm. Body whitish, speckled by the distinct, though not large, slightly (...truncated)


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Harrison G. Dyar. Life Histories of North American Geometridae—XXI, Psyche: A Journal of Entomology, 9, DOI: 10.1155/1901/84676