By Robert K. Nabours
Many of the genera and species of the Orthopteran sub-family Tet tigidae should be famous lower than numerous names within the studies of a couple of entomologists. they vary from the shape Bulla of LINNE (1767), whose figures are unmistakable, to the hot descriptions of SCUDDER (1900), HANCOCK (1902), and different orthoptologists. Such phrases as Tettix, Tettiginae and Tettigidae it sounds as if have been derived from "tettix" of Greek starting place, that means grasshopper. the typical identify, "Grouse locust," has most likely been utilized due to a fanci ful resemblance of a few of those bugs to the grouse (Tetraoninae). B I zero LOG Y zero F THE GR zero USE L zero C U S T S The Distinguishing features. the subsequent dialogue con cerning the features which distinguish the Grouse Locusts is basically from the specified descriptions via HANCOCK (1902) and Ro BERTSON (1915). (See Fig. I). FIG. 1. Lateral, dorsal and frontal elements of the physique of a customary grouse locust, Acrydium (From HANCOCK) they're one of the smallest of the Orthoptera. The super de veloped apical means of the pronotum extends backward over the 30 THE GENETICS OF THE TETTIGIDAE (GROUSE LOCUSTS) rationalization of Plate I (All figures from HANCOCK, 1902) FIG. 1. Choriphyllum /oliatum HANCOCK. girl from Jamaica. FIG. 2. Nymph of Acrydium obscurus HANCOCK. FIG. three. Tettigidea parvipennis getting ready the burrow for the eggs. FIG. four. Acrydium granulatus SCUDDER. lady. FIG. five and six. Dorsal and profile perspectives of posterior stomach appen dages of a male Acrydium hancocki MORSE.
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Extra resources for The Genetics of the Tettigidae (Grouse Locusts)
Sample text
Factors that were paired, the second the numbers of pairings, the third the numbers of crossovers, or segregations of <1>, and the last column gives the percentages of segregations or crossing over. 76 THE GENETICS OF THE TETTIGIDAE (GROUSE LOCUSTS) COLOR PATTERXS OF APOTTETTIX EURYCEPHALUS HAXCOCK Explanation of Plate IV (From Kansas Technical Bulletin 17) The drawings have been made by Mr. S. FRED PRINCE and, as printed, are about two and one-half times natural size. The top row represents the normal recessive type, +/+, and eleven dominant elementary patterns.
Ovember December January . February. March April. May. 9 per cent productive. 1923-24 , Productive I Matings :'IIa tings :'IIade 4 2 5 18 28 5 2 1 9 2 1 3 7 13 8 21 12 3 3 17 10 115 62 The number of individuals recorded fell far short of the number of young hatched and transferred from the mating jars. 6 per cent or 2850 of the 5634 offspring transferred, were finally recorded. 19 per cent of those transferred had their color patterns recorded. Table X shows the distribution of the mortality throughout the year.
And their expedientially assumed common normal allelomorph, indicated by +, respectively, is shown for both 73 INHERITANCE EXPERIMENTS males and females. The first column, to the left, gives the pairings of the factors with e. The columns of figures, to the left, on each side, under males and females, respectively, show the numbers of pairings of factors, the middle columns the numbers of crossovers, and the column to the right the respective percentages of crossing over. The first item, +e, refers to the reactions of e with the approximately common normal allelomorph of the extremely closely linked, some of them probably exact alternatives (except Hm), factors B, C, Cof, D, etc.