1870.] 27:1 



A soule^vllut smaller and uiucli more commou species than JJ. 

 sabulicola, to whieli some of the forms bear a great resemblance, but 

 the different general colour, and the want of the white cruciform 

 characters formed by the transverse nerves of the corium of the last 

 named species, will at once point out their distinctness. 



On the continent, there is a species described by Fieber under 

 the name of D. Linncei, which might be mistaken for D. striatus, and 

 although I have not met with it amongst the number of specimens I 

 have examined, it is worth while to examine all those supposed to 

 represent the insect now described. The posterior margin of the last 

 alidominal segment of the ? of D. Linncsi is r^ — . shaped, while in 

 D. striatus it is very faintly concave. 



Yellow, reddish, or brownish-yellow. Elytra longer or shorter 

 than the abdomen ; areas more or less margined with black ; nerves 

 white. 



Head — crown down the centre a little longer than the ■width across the anterior 

 margin of the eyes ; on each side of the apex a small brown or black triangular 

 spot, and before the anterior margin of the eyes a transverse, somewhat concave, 

 brown or black band. Face brown or black, witli 5-G transverse, fine, whitish 

 lines on each side, slightly thickened internally. Clt/peus yellow, with one or 

 two brown or black lines down the middle. Cheeks and lores yellow, the latter 

 margined with dark brown. 



Elytra longer or shorter than the abdomen, yellow or reddish or brownish-yellow ; 

 nerves white ; areas more or less margined with black. Legs as in D. Falleni. 



Abdomen : $ , beneath black, last segment broadly yellowish in the middle ; con- 

 nexivum with a triangular yellow spot on each segment ; genital valve black, 

 margin yellow ; apex somewhat obtuse ; plates black, an irregular patch at the 

 base, and the margin narrowly yellow ; hypopygial lobes thickly sot with stout 

 brownish hairs ; $ , beneath yellow ; 2-3 basal segments black in the middle ; 

 posterior margin of the last segment with a slight notch in the centre margined 

 with black. Length, li line. 



14. sociALis, Flor. 



Ah a rule, the brachypterous form is always pale, and with ahnoat 

 only the apical areas margined as in 1). Fallcni, while in i\w macrop- 

 terous form all the areas are more or Icsh broadly margined witli 

 black, thereby causing the nerves to appear much whiter than usual. 

 I), onustus, Fieb., and quadrii-iKdtus, Marshall, are both refei'able 

 here. 



Yellowish-brown. Croirn with a curved Mack line on each side 

 of the apex, as also a spot nearer to the eyes, and a faint, transverse, 

 broarl, sli<4htlv curved, brown hand in a line with the anterior marjiin 



