Descriptions and Records of Bees. 235 



Demodex equi, Raill. 



? . — This species is mucli wider tlian is usually the case 

 in the genus, tlie width (in mounted s|)ecimens) being about 

 a tliird of the total length of the body. Cephalothorax + 

 capitulum longer than abdomen ; the latter has the postn-ior 

 end widely rounded off or else bluntly painted. Capitulum 

 distinctly wider than long; the two rods on its dorsal surface 

 are not very long, but stout and blunt at the end. 



Ateisurements. — Length of body (including capitulum) 

 200-220 iJi, its width 68-70 /*. 



Material. — I have examined two adult female examples of 

 this species from English horses (Leslie Linzell's collection). 



This Demodex causes a definite skin disease in horses. 



EXPLANATION OF PLATE IX. 



Fig. L Democle.v ratti, Hahn. Ventral aspect. 



Fiff. 2. mnscuU, Oudms., nymph. Ventral aspect. 



Fig. 3. , female. Ventral aspect. 



XXV. — Descri/dions and Records of Bees. — LXXVI. 

 By T. D. A. CoCKERELL, University of Colorado. 



Hoplitis anodontura, pp. n. 



^ . — Length about 10 mm. ; anterior wing 7. 



Eobust, black, with mostly white hair, but on vertex, disc 

 of mesothorax, and abdominal segments 2 to 4 (except the 

 apical bands) it is pale ochreous ; facial quadrangle longer 

 than broad, face densely covered with white hair; antennse 

 short, looking like those of a female, the flagelluni red beneath 

 except at base ; vertex and cheeks with strong dense punc- 

 tures, but shining between the punctures ; mesothorax and 

 scutellum very densely punctured ; area of metathorax polished 

 and shining ; tegulse shining black. Wings strongly infus- 

 cated, brownish, the b. n. meeting t.-m., and second s.m. 

 long. Legs black, punctured, with glittering white hair; 

 inner side of tarsi witli pale reddish hair. Abdomen shining, 

 but very well punctured; segments 1 to 5 with entire, 

 narrow, white hair-bands; sixth segment very broadly 

 rounded and at sides obtusely angulate, but not toothed. 



Mexico (C. F. Baker Collection, 2499). 



Compared with H. adunca, the type of the genus, this 



16* 



