311 



sal (the left) and the ventral (the ri<;ht) surface and the narrow spaees 

 the three rows of lateral protuberances. The spines on the upper aiul 

 lower border of the segments are represented by dots. 



TABLE. 



IIYI'ODKKMA LINEATA. 



L;ist sc'giiicnt only, hearing- iiiial spira- 

 cles, t'ut.irely naked. 



Dorsal siirj'dcc. 

 Penultimate segmeut (10) sitiiied as the 

 preceding ones ou posterior margin. 



IIYI'ODKK.MA HOVIS. 



Tiie two terininal segments entirely 

 naked. 



Dorsal surface. 

 reiiultimate (10) and 9, together with 

 lateral protuberances, naked. 



^K.1 



2 



4 

 5 

 6 

 7 



a 



9 



to 



n 



Fig. 45.— Hypoderma lixeata— diagram of spiny 

 ariuature (after Bravier). 



Segments 2 and 3 and often 4 spinose 

 only anteriorly; 5, 6, 7 and 8 spinose 

 on both anterior and posterior margins. 



Segments 2-8 with the upper lateral pro- i 

 tuberauce spinose on the anterior mar- I 

 gin ; 2 and 3 with the middle protuber- 

 ances on the anterior margin ; 4, 5, 6, 

 on both anterior and posterior margins; 

 7, 8, 9 and 10 only on the posterior, and 

 2-10 of lower series spinose on both an- 

 terior and posterior margins. 



f'entral HurJ'ace. 



Segments 2-9" spinose on both the ante- 

 rior and posterior margins, especially 

 and in greater amount the latter, 10 

 only on posterior margin ; 11 naked. 



Stigmal plates flat hardly excavated to- 

 wards the psendo-stigmatic orifice, or 

 else with radiating tuirows as in H. 

 (liana. 



Body slender and more rugose ; the es- 

 caped larva grayish brown striped 

 with whitish gray. 



1 

 9 

 i 



$ 

 6 

 7 

 8 

 9 



n 



Fig. 46.— Hypoderma bovis— diagram of spiny 

 armature (after Brauer). 



2, 3, 4 and .5 spinose on both anterior and 

 posterior margins ; 6, 7, and 8 only ou 

 the posterior margin ; 9, 10 and 11 

 naked. 



2, 3, 4 and 5 upper and middle ))rotuber- 

 ances, and 2-8 of lower, spinose on an- 

 terior marariu. 



Ventral surface. 



Segments 2-9 spinose on both anterior 

 and posterior margins, more copiously 

 on the posterior margin and on the an- 

 terior margin of the 9th segment also. 



Stigu\al plates, convex, punctured and 

 with radiating furrows, each deeply 

 excavated, funnel-form, or auriform, 

 towards the pseudo-stigmal orifice. 



Body thick, rounded scarcely rugose ; the 

 escaped larva deep brown. 



