32 American Midland Naturalist Monograph No. 1 



Otobius lagophilus Cooley and Kohls, 1940 

 Plate 3, Figs. 11 and 12 



1940. Otobius lagophilus, Cooley and Kohls; original description, p. 928-933, with 

 figures. 



ADULT 



Body. — Rounded on both ends and but little constricted at the sides just 

 behind legs IV (less panduriform than in megnini); widest at legs II and III. 

 Length of female, 5.40 to 6.25; width, 3.60 to 4.00. Length of male, 4.75 to 

 5.00; width, 2.90 to 3.50. 



Integument :! on both dorsal and ventral surfaces granular with numerous 

 intermingled circular depressions or pits and each pit with a single small 

 central elevation. Very short, fine hairs present on the elevations in the circular 

 depressions, less apparent on the venter except near the mouth parts. 



Discs. — Indefinite, yet evident as symmetrical patterns of small depres- 

 sions, the floors of which are irregular. 



Legs. — Short, moderately heavy, and with hairs few and small. All tarsi 

 with moderate subapical dorsal protuberances, more pronounced on tarsus IV. 

 Length of tarsus I, 0.45; metatarsus, 0.39. Length of tarsus IV, 0.54; meta- 

 tarsus, 0.525. 



Coxae. — Coxae III and IV contiguous, the others separated. There are 

 deep invaginations between the coxae which are shown by dissection to be the 

 surface indications of large apodemes. Coxae I, II, and III each with an elon- 

 gated, smooth sclerite. 



Hood and Camerostome. — Definite hood and camerostome are not appar- 

 ent, though there is a moderate swelling ventrally excavated, just anterior to 

 the mouth parts. 



Capitulum. — Basis capituli very broid and short, curved, approaching a 

 reniform shape with the convex border behind. Surface irregular, with fine 

 hairs at the sides near the palpi and two groups, one on each side, near the 

 posterior margin. Palpi moderately heavy, with article 1 a little more swollen 

 than the others. Palpal hairs fine, moderate in length. 



Hypostome. — Vestigial, in marked contrast with the well developed hypo- 

 stome of the nymph. Broad, short, tapering, without denticles, concave dotsal- 

 ly, convex ventrally; bluntly rounded or partly bilobed apically. Length about 

 0.10. 



Folds. — Coxal and supracoxal folds present though less in evidence in well 

 engorged specimens. 



Grooves. — A short, transverse postanal groove present near the posterior 

 end. Median postanal groove faint. All other grooves are absent or negligible. 



3 Specimens of adults and nymphs preserved in alcohol are enclosed in a brittle, 

 thin, translucent covering which when dried is easily removed with a needle. The true 

 character of the integument of the body wall is better seen after this covering is removed. 



