45 



extremity is comparatively small and inserted towards the median line from the- 

 third. The first pair has a strong olecranon process on the postero lateral angle of 

 the second joint, and this may or may not be present on the correspon'iing joint 

 of the second pair of legs ; also, strong thorn-like spines project from the outer 

 side of the tourth and fifth joints of these two pairs of legs. The abdomen, which 

 in males is much narrower than the cephalo-thorax, has its posterior bordei' 

 simply roimded. 



Analges passerinus, De Geer. This species has been found on Dolichonyx 

 oryzivorus, Junco hyemalis, Spizella socialis, and 8ayornis fuscus. 



Ana/ges /riiiffillaruin, Koch., has been found on Goniaphia ludoviciana, and 

 Empidonax flaviventris. 



Analges tridenlidatus, Haller.,on the Horned Lark, Eremophila alpestris. 



Analges digitatus, Haller, on Dendro^ca striata and Sitta G'arolinensis. 



ANALGES LONGLSPINOSUS, n. sp. 

 Figs. 1 & 2, Plate i. 



Male. — The general shape of the body is long ovate, with the obtuse end 

 turned towards the Iront. A chitinous band runs across the back almost imme- 

 diately behind the second pair of legs. The side of the body between the insertions 

 of the second and third pairs somewhat longer than the width of the abdomen, 

 the length of which is considerably less than the distance from the base of the 

 rostrum to tlie insertion of the third pair of extremities. 



On the first extremity, on the second joint, the olecranon process is largely 

 developed, and tlie anterior angle of the inner side projects forwards and inwards, 

 meeting the downwardly projecting posterior angle of the fourth joint, and forming 

 ■with it a nipper-like organ as shown in fig. 2. On the second extremity it is 

 scarcely noticeable. The external process on the fourth joint in botli is small and 

 directed backwards, but on the fifth it is quite large and strong. The enormous 

 third extremities, however, are what first attract the attention. The first joint or 

 haunch is large and separated bv an oblique line of junction from the second, 

 which is very large, bearing on its inner side a long curved blunt process which 

 forms with the fifth joint a powerful nipper. The lact joint or tarsus is small 

 and bears on the inner side at its base a little blunt tooth which runs out into a 

 fine hair. 



The fourth extremities are inserted on the ventral surface towards the centre 

 line from the point of attachment > f the third, and lie in a ongitudinally striated 

 groove under the border of the abdomen, reaching considerably beyond its poste- 

 rior end when stretched out to their full extent. 



The bristles are mostly long and stout. The anterior laterals are a little 

 distance behind tlie insertion of t'e second pair of legs, with the anterior dorsals 

 towaids the middle line from them, two in number, one on each side, the inner 

 one being very small. The posteiior dorsals are large, two on each side, with the 

 posterior laterals near them on th- edge of the body. End bristles three in num- 

 ber on each side, the centre one leing much the largest. Length of body -45 

 mm., breadth -2(5 mm. 



The female is considerably larger than the male, the relation of the length 

 to the breadth being about 12 to 5. The posterior pairs of extremities are small 

 and situated about the middle of the lateral surface of the bod}'. 



This species is closely allied to .4. Nitzschii, Haller. It is found in consider- 

 able numb:?rs on the Snow Bunting — Plectrophaaes niva'is. 



ANALGES TYRRANXI, n. sp. 

 Fig. 3. Fl. i. 

 Male. — General sliRpe more or less obovate, with a length of -32 mm. and a 

 breadth of -19 mm. ; abdomen a little longer than the side of the c>-phalo-thorax,. 



