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Notes on Ticks. IV. Relating to the Genus Ixodes and including a description of three new Species and two new Varieties

Published online by Cambridge University Press:  06 April 2009

George H. F. Nuttall
Affiliation:
(From the Quick Laboratory, University of Cambridge.)

Extract

Female (Fig. 1): Colour: scutum, basis capituli, coxae, distal parts of femur and proximal portions of tarsi and intervening articles are blackish brown, the remaining hard parts shading to yellowish-brown. (Dorsal aspect) Body (partly gorged) short and broad. Scutum about as long as broad, 0·87 × 0·85 mm., very slightly emarginated, with rounded scapular angles, antero-lateral borders almost straight, lateral angles situated at the anterior third of the length, posterior border rounded; cervical grooves deep, far apart, but slightly concave outwardly and slightly divergent, fading near the postero-lateral borders; surface glossy, somewhat rugose; punctations few, mostly fine. Capitulum with base roughly equilateral-triangular, short pointed cornua and sinuous dorsal ridge; porose areas not depressed, subcircular, near ridge, the interval less than their width and hollowed. Palps slender, article 1 small, articles 1–2 almost fused, broadest at the distal third of article 3 which is rounded distally; (Ventral aspect) hypostome club-shaped, 4|4 merging to 3|3 and 2|2 posteriorly where the median unarmed ridge broadens, teeth sharp, 12 per external file; basis capituli constricted where the short pointed recurved auriculae arise, posterior margin straight with rounded angles. Venter: vulva between coxae II; anal grooves form a small closed ring situate near the posterior border; spiracle ovoid, macula central. Legs slender; coxa I with short internal and stout external spur; stout external spurs on coxae II–IV progressively decreasing in size; trochanters with slight spurs; tarsus 4 tapering gradually, the distal pseudo-article about thrice as long as the basal; pads large but shorter than the claws.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1916

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References

REFERENCES

The reader is referred to Bibliography of the Ixodoidea, Part I, 1911 (2004 titles), by Nuttall, Robinson and Cooper, and Part n, 1915 (462 titles), by Nuttall and Robinson. Cambridge: University Press.Google Scholar
The paper by Nuttall, (1913) appeared in Parasitology, vi.Google Scholar
Ticks, a Monograph of the Ixodoidea, Part II. The Genus Ixodes (1911) by Nuttall and Warburton, pp. xix +105–348, 4 plates and 292 text figures. Cambridge: University Press.Google Scholar