298 LAMELLICOBNIA. 



as in A. wguata, is much less produced and reflexed than in A. scarabceoides. I have 

 adopted the MS. name given to the species by Sturm. 



3. Ancognatha humeralis. (Tab. XVII. figg. 13, <j ; 14, ? , var.) 



Cyclocephala humeralis, Burm. Handb. der Ent. v. p. 40 \ 



Hal. Costa Eica (Van Patten); Panama, Volcan de Chiriqui 4000 to 6000 feet 

 (Champion, Trbtsch). — South America, Colombia \ Venezuela, Ecuador, Peru. 



In specimens from southern localities the black spots of the elytra appear to be two 

 only in number, and small ; in those from Chiriqui the spots are often greatly developed 

 and increased in number, forming black streaks near the suture and sides and on the 

 disc ; in some examples the whole disc of the elytron is black. The hair-fringe beneath 

 joints 1-4 of the hinder tarsi is dense but not very long. The apical tooth of the labrum 

 is well-developed. 



In the female the marginal callus of the elytra is extremely prominent, and forms a 

 projecting lobe. 



We figure a male example from Costa Rica, and a female from the Volcan de 

 Chiriqui. 



4. Ancognatha manca. 



Cyclocephala manca, Leconte, Proc. Ac. Phil. 1866, p. 382 x ; Horn, Trans. Am. Ent. Soc. 1871, 

 p. 335. 



Hal. North America, Arizona 1 . — Mexico, Pinos Altos in Chihuahua (Buehan- 

 Heplurn). 



A single male example, without tarsi. 



5. Ancognatha qnadripunctata. (Tab. XVII. fig. 15, s .) 



A. Jiumerali simillima, sed differt thorace <$ latissimo, convexo, et elytris $ sine callo laterali. Flavo-testacea, 

 nitida, elytris callo humerali maculaque utrinque prope scutellum, femoribus tibiisque apicibus, nigris ; 

 capite' et tboraee sparsissime et subtiliter punctulatis, clypeo £ antice obtuse rotundato, fronts sub- 

 bituberculata; elytris parum distincte striato-punctulatis. Pygidhim tf pilifero-punctatum, $ fere lseve. 

 Tarsi 4 posteriores <S articulis l°-4 m subtus longe et dense ciliatis. 



Long. 20-26 millim. 



Hal. Mexico (Salle, ex coll. Sturm), Peras, Capulalpam (Salle), Mexico city (Hoge). 



Five examples. 



In the absence of a lateral callus to the elytra in the female the species resembles 

 A. ustulata ; but in the latter the margin on the site of the callus is a little expanded, 

 which is not the case in A. quadripunctata. I have adopted the name given to the 

 species by Sturm in the Salle collection and in his published catalogue. 



