showed an enormous range of variation between the offspring of one 

 female" . As much caution must be employed in evaluating laboratory- 

 reared specimens as in evaluating field-collected material. Under 

 abnormal, artificial conditions, some individuals that would not 

 survive in the field may be protected enough to maintain the life 

 they would otherwise lose tmder inclement conditions. Artificial 

 conditions in themselves obviously induce morphological modifica- 

 tions. At any rate, extremely few atypical specimens are fovind 

 in field collections. 



IDENTIFICATION 



Males ; The scutum is black or reddish-black and measvires 

 approximately 3.3 mm. long and 2.3 mm. wide. It is characterized 

 by long, deep, distinct, cleanly cut lateral grooves; smooth, 

 glossy, impunctate surface except caudally, where there is a 

 dense patch of large, contiguous punctations. The scutiim is 

 narrowed posterior of the spiracular plate, but the posterior 

 margin is usually not so squarely truncate as in K. impressum . 

 The festoons number seven and the central one is not morpholog- 

 ically differentiated, as compared with H. albiparmatum in which 

 the central festoon forms a parma resembling a miniatiire cellu- 

 loid watch cover, variable in size, shape, and color. Ventrally, 

 the small rectangvilar subanal shields lie posterior of the axis 

 of the larger, rectangular adanal shields. The legs are red- 

 dish brown with bright paler rings. 



Variable field collected males may be small and stunted 

 and lack the subanal shields. Such specimens are the basis of 

 Schulze*s so called •*}!. lewisi '* in the "subgenus Hyalonrnina " 

 (page 521) . Collections from 'a few areas show somewhat more 

 than ordinary scutal punctation. The long, clear, cleanly cut 

 lateral grooves indicate that such specimens are H. truncattim 

 and not lightly ptmctate H. impressum , as does also the com- 

 paratively more rounded posterior margin of the body. 



Although H. marginatum occurs with H. triincatum only in 

 rare localitie's at the northern periphery of the range of the 

 latter, it may be well to add that the scutum of H. truncatum 

 is characterized by fewer scapular and central punctations; 



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