Females ; The genital apron is typically an almost equilateral 

 triangle with slightly convex margins, and the posterior junctiire 

 is rounded or narrowly tmncate, not narrowly pointed . In profile, 

 it is very gradually sloping (Figure lbl,E,F ) when imengorged but 

 somEfwhat more abruptly sloping when engorged; in greatly engorged 

 specimens the central area protrudes (Figure 161,d) sometimes with 

 a very slight concavity centrally. The anterior margin may be 

 straight or slightly concave or slightly convex, and in profile 

 the posterior slope may be more acute than it is in typical fe- 

 males; in these cases there may be a very narrow bulge along the 

 anterior margin. The shieldshaped scutum is longer than wide; 

 smooth and shiny; with from four to ten superficial, scattered 

 punctations of large diameter; punctations may be entirely laclo. 

 ing or a very few, shallow, minute punctations may be present. 

 The scutal surface in greatly engorged specimens may be slightly 

 riigose. The cervical grooves are long and wide, and reach the 

 posterior scutal margin. 



Note: According to Pomerantzev (1950)> H. detritum is 

 largest in Middle Asia and gradually diminishes in size towards 

 the west (Algeria) . Color differences of various parts of the 

 body do not support division of H. detritum into geographical 

 races. 



The larva and nymph of H. detritim have been described and 

 compared vfith those of other Russian species by Bernadaskaia 

 (1939c). Feldman-Muhsam (19^S) also described these stages and 

 compared them with those of Palestinian species. 



Identification of "H. scupense " 



The following remarks concerninr' the biological race "H. 

 scupense " are from Pomerantzev (1950); " 



H. scupense is similar to H. detritTom and difficult to 

 distinguish. It is smaller, has shorter legs, and has a more 

 distinct caudal field in the male as well as greater scutal 

 rugosity. The dorsal projection of the spiracular plate is 

 broader and shorter. The capitulum is smaller and the porose 

 areas of the female are more rounded than in H. detritum . The 

 maximum size of the spiracular plate occurs in specimens from 



- A18 - 



