442 



BUREAU OF ANIMAL INDUSTRY. 



Fig. 157.— Dorsal view 

 of female E. calca- 

 rat'us. After Birula, 

 1895, fig. 11. 



Fig. 158.— End of 

 mandible of fe- 

 male E. calca- 

 ratus. After 

 Birula, 1895, 

 fiff. 12. 



Fig. 159.— Coxa I of female E. 

 calcaratus. After Birula, 1895, 

 fig. 13. 



shield, facing outward. Capitulum short and broad (almost twice as broad as long), 

 frontal portion hexagonal, lateral angles very prominent, postero-lateral margins 

 perceptibly emarginate; margins, anterior nearly straight, pos- 

 terior arched; posterior portion of the capitulum constricted 

 like a neck, equal in length to the frontal portion; ventrally 

 the posterior margin of the capitulum is almost 

 semicircular, no posterior angles, situated in the 

 anterior emargination of the breast. Frontal 

 areas densely porose, ovate, moderately large, 

 placed obliquely on the posterior superficial 

 portion of the capitulum. Palpi and rostrum 

 [haustellum] attaining almost the length of the 

 frontal portion of the head. Rostrum [haustel- 

 lum] slightly longer than the palpi, broad and 

 short, incised at the apex, no apical granulated 

 portion, teeth [denticles] rhomboidal, obtuse, 8 rows (9-10 denticu- 

 late series not attaining the base). Hooks of the mandibles: Nar- 

 rower ones bidentate, broader ones 

 bidentate or tridentate. Palpi very 

 short, subcorneal, spiniferous; first 

 article very small, hidden under the 

 anterior margin of the capitulum; second article pe 

 dunculate, in the dilated part a sharp transverse ridge 

 drawn out in an angle at the external margin, pro 

 vided with an internal 

 dilated margin, ante- 

 rior portion dilated, 

 armed beneath on the internal margin with several 

 short and very strong spines; third article smaller 

 than the preceding, subtriangular, internal margin 

 rounded, spiniferous, arched pos- 

 teriorly, external angles acute. 

 Legs short, subequal, first tarsi 

 unicalcarate, the others bicalca- 

 rate (the apical spur being twice 

 as long and strong), robust and 

 long spines located on the internal 

 margin. First coxse subtriangular, 

 sparsely setose above, provided on 

 the posterior margin with tw^o 

 very short blunt teeth (rounded at 

 the apex); coxse II and III elon- 

 gate rotund, posterior margin in- 

 cised; coxae IV subquadrate, with 

 angles rounded or nearly elongate- 

 rotund. Auditory vesicle of the 



I tarsi ovate, with distinct internal hairs; proximal and distal of 

 the vesicle the external margin is provided with chitinous indura- 

 tions, of which the distal (apical) seen from the side of the tarsus 

 is smaller, conical, the apex scarcely dilated, the proximal (basal) 

 is pedunculate (the pedicle being short and thick) and provided 

 with a head at the apex. Genital pore very small, situated between and a little 

 below the I coxse. Anal valve provided on both sides with four spines, arranged in 

 a triangle. Spiracle areas very small, one-half as large as the posterior coxse, ellip- 



Fig. 160.— Tarsus I of female E. cal- 

 caratus: V, auditory vesicle; imb, 

 basal chitinous callum; ina, api- 

 cal chitinous callum. After 

 Birula, 1895, fig. 14. 



Fig. 161.— Tarsus IV 

 of female E. calca- 

 ratus. After Biru- 

 la, 1895, fig. 15. 



