654 Pomona College Journal of Entomology 



legs as against the forty-five in limatus. Tiie antfiinae arc typically smaller and 

 shorter. 



Found by tlie aiitlior to be very common during the wet season about Mon- 

 terey Bay. Also taken at Oroville (April, IIHI). In both of these places it 

 ajipears wholly to replace liiiialus. 



Family Arrupidae fani. nov. 



Differs from the preceding family (as represented in California) in having 

 the three divisions of the labruni, of which the median is larger, entirely unarmed; 

 in having the coxie of the second maxillte entirely separate ; and in having the 

 mandible with but two pectinate lamella". 



Verhoeff's superfamily name Placodesmala, proposed for the Mecistocepha- 

 lidae, may now, with better service, be employed to indicate the group formed 

 bj' this family and the Arrupidae. 



Genus Arrup q:en. nov. 



Labruni strongly ehitinized, edges all smooth ; the median piece broadly 

 triangular, with tlie apex directed caudad. First maxillise with the outer branch 

 long, entire, membranous distad ; no lappets. Palpus of second maxillae triarticu- 

 late, without a claw. Last ventral plate wide, triangular ; coxopleural pores few, 

 small. Antennffi thick, sub-filiform. First joint of prehensors with a large, 

 conical, strongly ehitinized tootli; other joints unarmed. Anal legs unarmed. 



Type. — Arrup pylorus sp. nov. 



Arrup pylorus .sp. nov. 

 Attenuated cephalad, more strongly caudad. Dorsum with a sharply im- 

 pressed longitudinal median sulcus. Fulvous in color ; head light reddish brown. 

 Head widest anteriorly, narrowed to caudal margin which is truncate ; anterior 

 margin extended forward from sides to middle. Antenna? short, thick; all 

 articles short, decreasing from basal ones to the penult ; ultimate longer than the 

 two preceding taken together. Basal plate overlapped by the cephalic; exposed 

 portion very short, but little more than one-seventh as long as the cephalic, -LS 

 times wider than long. Spiracles all circular, the first very much larger than 

 the second. Last ventral plate wide, triangular, the sides converging caudad to 

 meet at an angle. Coxopleural pores three or four on each side, small, adjacent 

 to edge of last ventral plate. Anal legs in male crassate. Pairs of legs, forty-one. 

 Length, 22 mm. (type). 



Localities. — Sausalito and Berkeley (author, April, 1911). 



Family Tampiyidae fam. nov. 

 Labruni of one, uniformly ehitinized ])iece, which is firmly coalesced with 

 the labrum exeel)ting at the ends where the suture m;iy be detected; median 

 portion conspicuously protuding, armed caudad with few stout teeth, the lateral 

 portions pectinate. First niaxill* with outer branch distinctly biarticulate, the 

 first article with a lai)))et, the apical joint thick, strongly bent inward and con- 

 tiguous with its fellow. Palpi of second maxilhe triarticulate, ending in claws, 

 which are simple, not toothed or |)ectinate. Prosternum with strongly developed 



