160 ENTOMOLOGY FOR MEDICAL OFFICERS 



symmetrically-arranged, dark, round spots on the dorsum of 

 the abdomen. It generally deposits its eggs in horse-dung, 

 but also, according to Newstead, whose account of its develop- 

 ment is here summarised, in musty grass-mowings. 



A female lays from 50 to 70 eggs, which are white, and 

 are shaped somedeal like a banana with a broad groove 

 along the shorter and straighter curvature : in warm weather 

 they hatch in two or three days. The larva and pupa are not 

 remarkably different from those of other Muscidce [cf. Figs. 

 53> 54) j the larva becomes full grown, if the pabulum be 

 warm and moist and protected from light, in fourteen to 

 twenty -one days ; the pupal stage in Newstead's observations 

 lasted nine to thirteen days. In unfavourable conditions, 

 such as cold, drought, and exposure to bright light, the 

 developmental stages are said by Newstead to be prolonged. 



//"i^wa^i^^/rt, Robineau-Desvoidy (a?/xa = blood ; /3/o? = way 

 of life). In distribution, habits, and general appearance 

 similar to Stomoxys, from which it is distinguished (Fig. 60) 



maxp 

 epiph 

 hypophl 



Fia. CO.— Head of Hcematohia. 



by the smaller head, by the shorter and rather coarser pro- 

 boscis, by the long spatulate maxillary palps, and by the 

 presence of a few hairs on the lower border of the antennal 

 bristle. As in Siomoxys there are a few bristles at the 

 proximal end of the 3rd longitudinal vein. 



Lyperosia, Rondani (Fig. 61) (Av7rv/oo'y = troublesome). In 

 distribution and habits similar to Stovioxys, but not much 



