. Brigham Young University science bulletin. Biology -- Periodicals. Biological Series, Vol. 5, No. 4, February, 1965 33 Nymphs The number and placement of setae in the nymphs are too variable to be of use in separ- ating the species considered in this study. The lateral points of the b;isis capituli in D. alhipictus are the shortest observed in all species. The lateral points on the basis capituli of D. halli are the longest of all species exam- ined. The lateral points of D. halli and D. vari- (ihilis extend well beyond the apex of the scap- ulae. Palpal length and width are variable between
. Brigham Young University science bulletin. Biology -- Periodicals. Biological Series, Vol. 5, No. 4, February, 1965 33 Nymphs The number and placement of setae in the nymphs are too variable to be of use in separ- ating the species considered in this study. The lateral points of the b;isis capituli in D. alhipictus are the shortest observed in all species. The lateral points on the basis capituli of D. halli are the longest of all species exam- ined. The lateral points of D. halli and D. vari- (ihilis extend well beyond the apex of the scap- ulae. Palpal length and width are variable between species. Short, broad palps were observed in D. alhipictus while long, slender palps were found in D. occidentahs and D. variabilis. Basal spurs ;u-e present on all species with the exception of D. huntcri. They are most dis- tinct on D. occidentahs. Scutum: Punctations and ornamentation are absent in the nymphal stage. Size of scutum is distinctly variable. D. halli has the largest and D. huntcri the smallest. The curvature of the posterior margin is also variable among the species with D. halli having a broadly curved, almost truncate margin. D. huntcri is weakly curved. No particular form of cervical groove can be described as typical. Coxae: The external spur on coxa I is dis- tinct in each species. D. andersoni has the larg- est with D. variabilis possessing the next largest. D. parumapertus has the smallest spur for coxa I. The external spur on coxa IV of D. occiden- talis and D. parumapertus is indistinct to absent. The internal spur on coxa I is somewhat uni- formly distinctive although it is essentially small in all the species. Spiracular plate: A distinct variation was observed both in the size of plates and goblet cells. D. albipictus has the largest spiracular plate and goblet cells. D. variabilis has a rela- tivelv large plate, but the goblet cells are com- paratively minute. D. huntcri has the smallest spiracular plate. In e\ery species, with the ex- ception of
Size: 1128px × 2215px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbrighamyounguniversity, bookcentury1900, bookcollectio
