I'ACHYUHHIXADORETUS. 287 



different localities. The figures given by Dr. Ohaus as distinctive 

 of P. rugipennis and P. deccanus respectively seem to represent 

 the extremes, the typical P. deccanus form occurring only in the 

 soutli of the peninsula, while specimens from localities succes- 

 sively farther north exhibit progressive attenuation of the aedeagus 

 (as shown here in Plate V, figs. 4 to 10), until at Ahmedabad practi- 

 cally the ruyipennis form appears. JSTo corresponding external 

 differences have been found, and the females are indistinguishable. 

 Since there seems to be no practical use in giving names to each 

 link in this chain of local races, I have treated them as a single 

 species with the name of rugipennis. 



308. Pachyrrhinadoretus frontatus. 



Adoretus frontatus, Burm.,* Handb. Ent. iv, 2, 185o, p. 530. 

 Pachi/rrhinadoretus costatus, Okaus, Deutsche Eat. Zeits. 1912, 

 p. 511. 



Orange-yellow, with the forehead dark and (in the male) also the 

 clypeus, the middle of the pronotum and the elytra, except the 

 elevated costae and the outer margins. The body is clothed above 

 and beneath with very fine grey pubescence, which is sparse, 

 except upon the head, and the pronotum and pygidium of the male. 



It is elongate-oval and slightly depressed. The head is very 

 closely and rugosely punctured, and the clypeus semicircular. 

 The pronotum is finely punctured, strongly and evenly rounded 

 at the sides, with the front angles acute and the hind angles 

 obsolete. The elytra are closely and rugosely punctured, with 

 three well-marked smooth costse rather far apart upon each. 



cJ . The three teeth of the front tibia are small, the abdomen 

 is arched beneath, and the pygidium exposed and rather closely 

 clothed with erect fine hairs. 



. The colour is pale, except upon the forehead, the clypeus 

 is rather longer and the eyes smaller. The pronotum is much 

 less closely punctured, especially in the middle. The abdomen is 

 convex beneath and the pygidium covered. The front tibia is 

 short and broad, and the three teeth are very strong and sharp. 



Length, 10-1 1*5 mm. ; breadth, 5-6 mm. 



BENGAL : Pusa (Oct., at light). 



Type in the Halle Museum, that of P. costatus in Dr. Ohaus' 

 collection. 



In the Hope collection at Oxford are a male and a female 

 labelled " Central India Boys," and I have no doubt that Bur- 

 meister's type, which has been lent to me for comparison, was 

 sent to him from Oxford and was one of this series. It is the 

 female, however, which he has described, and the original descrip- 

 tion therefore contains two vital mistakes, the locality " Assam " 

 and the statement that it applies to the male. There are al.-o 

 specimens from Boys' series in the British Museum. Dr. Ohaus 

 has mistakenly referred the species to the genus Pseudadorctus 

 (Deutsche Ent. Zeits. 191-1, p. 514). 



