56 The Philippine Journal of Science ms 



a little upward, ocelli two-thirds more distant from eyes than 

 from each other, pronotum declivous (anterior lobe less so), very 

 slightly narrowed from base to apex with sinuate lateral margins 

 and well-marked transverse impression, its posterior lobe one- 

 half longer than the anterior one, coarsely and thickly punctate, 

 abdomen parallel from its base to beyond middle, and first joint 

 of hind tarsi scarcely longer than the other two joints together. 

 Banks describes the meso- and metapleura as coralline, but 

 they are fuscous, whereas the propleura are red, quite as should 

 be expected, species with a pale pronotum also having pale 

 propleura. 



The genera Astacops Boisd. and Scopiastes Stal were united 

 by Breddin, but Horvath* has recently again separated them, 

 on the basis of characters other than those used by Stal. They 

 could in fact be kept apart, should the characters relied on by 

 Horvath really hold good, but this is not the case. Boisduval 

 founded his genus on two new species, avstralis and doryca. 

 The former, which was fixed as type by Distant, does not seem 

 to have been rediscovered since it was described, but I suspect 

 it is a Scopiastes (in Horvath's sense). Astacops doryca is 

 unknown to me, but as Stal says of it "caput basi thoracis vix 

 angustius," it seems also to be a Scopiastes (Horv.). Since 

 the founding of the genus numerous other species have been 

 described, and some of them have been placed in Astacops, some 

 in Scopiastes; but among them there are several species that 

 are manifestly intermediate between these genera, either as 

 understood by Stal or by Horvath. As all must agree that the 

 characters given by Stal cannot be used to separate them, we 

 have in the following examples to take into account only the 

 characters given by Horvath : 



Astacops gracilis Bredd. : Head as in Scopiastes, tarsi as in 

 Astacops, pronotum intermediate. 



Astacops laticeps Bredd. and lividiventris Bergr. : Head, form 

 of pronotum, and tarsi as in Scopiastes, mutual length of pro- 

 notal lobes as in Astacops. 



Astacops caviceps Bergr. : Head and pronotum as in Scopias- 

 tes, tarsi as in Astacops. 



Astacops fulviventris Bergr. : Head and tarsi as in Scopiastes, 

 mutual length of pronotal lobes as in Astacops, form of pro- 

 notum intermediate. 



The genus Acthalotus Stal was separated from Astacops and 

 Scopiastes by the character "ocellis inter se quam ab oculis 



* Ann. Mils. Nat. Hting. (1914), 628. 



