172 Mr. G. J. Arrow on the 



the large juxtascutellar spots. It is equally closely allied 



to C. tutelina, Burm., in which the small elytral spots are 



absent and the lateral lobe of the elytra in the female is 

 smaller and more abrupt. 



Two species have received the name of C. villosa, the first 

 being a Bolivian species of Blanchard's. I propose to sub- 

 stitute borealis for villosa, Burm., a North-American insect. 



Chalepus leucophthalmus, Fisch., appears to me from the 

 description to be Cijclocephala melanocephala, F., or one of 

 the two or three closely similar species. 



A peculiar sexual difference characterizing a large pro- 

 portion of the species of Cyclocephala has been overlooked. 

 It occurs in the mandibles, those of the male being con- 

 spicuously toothed externally at the extremity. This is very 

 apparent in the following new species : — 



Cyclocephala gregaria, sp. n. (PI. IV. fig. 11.) 



Nigra, prothorace, scutello, elytrorum macula utrinque media, vitta 

 suturali juucta (hac apice plerumque dilatata), abdomine peetore- 

 que plus minusve fulvis vel rufis ; breviter ovata, corpore supra 

 et subtus plus miausve fulvo-hirsuto (femiuis autem interdum 

 fere glabris) ; clypeo sat magno, antice truncato, rugoso, vertice 

 punctate ; prothorace parce subtiliter punctate ; scutello paulo 

 punctate ; elytris insequaliter baud prefunde punctatis : 



<5 , subtiliter punctata, sat dense et lenge pilosa, pygidio precipue, 

 mandibulis apice extus recta reflexis, tarsis anticis crassis, ungue 

 majori minute fisso : 



$ , elytris gressius et magis seriatim punctatis, paulo hirsutis, 

 pygidio nitide, parce punctate et hirsute, elytrorum lateribus 

 multe pest medium valde angulatis. 



Long. 17-21 mm. ; lat. max. 9-5-11 mm. 



Hab. Colombia : Medellin {Buckley), Cauca Valley ; 

 Ecuador : Macas (Buckley). 



Yar. pallida. Fulva, capita, pedibus, pectoris lateribus, elytro- 

 rumque marginibus a basi ad partem tertiam fuscis. 



Hab. Medellin. 



I have received this from Messrs. Staudinger and Bang- 

 Haas with the unpublished name I have adopted. It is 

 nearly related to C. conspicua, Sharp, but differs in its hairy 

 clothing and immaculate pronotum. The markings are very 

 variable. In one specimen the elytra are black, with a large 

 quadrate reddish patch near the middle of each. Normally 

 there is also a stripe of the same colour upon the posterior 



